diff --git a/apps/web/src/components/molecules/ProviderMappingStep.scss b/apps/web/src/components/molecules/ProviderMappingStep.scss
new file mode 100644
index 0000000..5367713
--- /dev/null
+++ b/apps/web/src/components/molecules/ProviderMappingStep.scss
@@ -0,0 +1,9 @@
+.provider-mapping-step {
+  align-content: start;
+}
+
+.provider-mapping-step__intro {
+  margin: var(--space-2) 0 0;
+  color: var(--color-text-muted);
+  font-size: var(--text-sm);
+}
diff --git a/apps/web/src/components/molecules/ProviderMappingStep.stories.js b/apps/web/src/components/molecules/ProviderMappingStep.stories.js
new file mode 100644
index 0000000..68ec5a5
--- /dev/null
+++ b/apps/web/src/components/molecules/ProviderMappingStep.stories.js
@@ -0,0 +1,17 @@
+import ProviderMappingStep from './ProviderMappingStep.vue';
+
+export default { title: 'Molecules/ProviderMappingStep', component: ProviderMappingStep };
+
+export const Empty = {
+  args: {
+    productId: '', providerId: '', mappingType: 'PRODUCT', externalIdentifier: '', searchQuery: '',
+    products: [{ id: 'product-1', name: 'Charizard ex #199/165' }],
+  },
+};
+
+export const SearchMapping = {
+  args: {
+    productId: 'product-1', providerId: 'ebay', mappingType: 'SEARCH', externalIdentifier: '', searchQuery: 'Charizard ex 199/165 near mint',
+    products: [{ id: 'product-1', name: 'Charizard ex #199/165' }],
+  },
+};
diff --git a/apps/web/src/components/molecules/ProviderMappingStep.vue b/apps/web/src/components/molecules/ProviderMappingStep.vue
new file mode 100644
index 0000000..3241c4f
--- /dev/null
+++ b/apps/web/src/components/molecules/ProviderMappingStep.vue
@@ -0,0 +1,60 @@
+<script setup>
+defineProps({
+  productId: { type: String, required: true },
+  providerId: { type: String, required: true },
+  mappingType: { type: String, required: true },
+  externalIdentifier: { type: String, required: true },
+  searchQuery: { type: String, required: true },
+  products: { type: Array, required: true },
+  isSaving: { type: Boolean, default: false },
+});
+
+defineEmits([
+  'update:productId',
+  'update:providerId',
+  'update:mappingType',
+  'update:externalIdentifier',
+  'update:searchQuery',
+  'product-change',
+  'submit',
+]);
+</script>
+
+<template>
+  <form id="workflow-mapping" class="showcase-panel provider-mapping-step" @submit.prevent="$emit('submit')">
+    <div>
+      <p class="catalog-kicker">Step 2</p>
+      <h2>Link Market Sources</h2>
+      <p class="provider-mapping-step__intro">Connect a provider product or search so future copies can reuse the source.</p>
+    </div>
+    <label class="fixture-label" for="mapping-product">Product</label>
+    <select
+      id="mapping-product"
+      :value="productId"
+      class="fixture-input"
+      required
+      @change="$emit('update:productId', $event.target.value); $emit('product-change', $event.target.value)"
+    >
+      <option value="" disabled>Select a product</option>
+      <option v-for="product in products" :key="product.id" :value="product.id">
+        {{ product.name }}
+      </option>
+    </select>
+    <label class="fixture-label" for="mapping-provider">Provider ID</label>
+    <input id="mapping-provider" :value="providerId" class="fixture-input" required placeholder="ebay" @input="$emit('update:providerId', $event.target.value)" />
+    <label class="fixture-label" for="mapping-type">Mapping type</label>
+    <select id="mapping-type" :value="mappingType" class="fixture-input" @change="$emit('update:mappingType', $event.target.value)">
+      <option value="PRODUCT">Product</option>
+      <option value="SEARCH">Search</option>
+    </select>
+    <label class="fixture-label" for="mapping-external">External identifier</label>
+    <input id="mapping-external" :value="externalIdentifier" class="fixture-input" @input="$emit('update:externalIdentifier', $event.target.value)" />
+    <label class="fixture-label" for="mapping-query">Search query</label>
+    <input id="mapping-query" :value="searchQuery" class="fixture-input" @input="$emit('update:searchQuery', $event.target.value)" />
+    <button class="button button--primary" type="submit" :disabled="isSaving">Save provider mapping</button>
+  </form>
+</template>
+
+<style scoped lang="scss">
+@use './ProviderMappingStep.scss';
+</style>
diff --git a/apps/web/src/pages/AdminHomePage.vue b/apps/web/src/pages/AdminHomePage.vue
index 70ee587..1b1e4d4 100644
--- a/apps/web/src/pages/AdminHomePage.vue
+++ b/apps/web/src/pages/AdminHomePage.vue
@@ -6,6 +6,7 @@ import { useAuth } from "@/composables/useAuth.js";
 import AdminListingStatus from "@/components/molecules/AdminListingStatus.vue";
 import InventoryWorkflowStepper from "@/components/molecules/InventoryWorkflowStepper.vue";
 import ProductIdentityStep from "@/components/molecules/ProductIdentityStep.vue";
+import ProviderMappingStep from "@/components/molecules/ProviderMappingStep.vue";
 import {
   createAdminInventory,
   createAdminProduct,
@@ -685,60 +686,22 @@ onMounted(load);
         @update:category-id="categoryId = $event"
         @submit="createProduct"
       />
-      <form id="workflow-mapping" class="showcase-panel" @submit.prevent="createProviderMapping">
-        <h2>Link provider mapping</h2>
-        <label class="fixture-label" for="mapping-product">Product</label>
-        <select
-          id="mapping-product"
-          v-model="mappingProductId"
-          class="fixture-input"
-          required
-          @change="loadProviderMappings()"
-        >
-          <option value="" disabled>Select a product</option>
-          <option
-            v-for="product in products"
-            :key="product.id"
-            :value="product.id"
-          >
-            {{ product.name }}
-          </option>
-        </select>
-        <label class="fixture-label" for="mapping-provider">Provider ID</label>
-        <input
-          id="mapping-provider"
-          v-model="mappingProviderId"
-          class="fixture-input"
-          required
-          placeholder="ebay"
-        />
-        <label class="fixture-label" for="mapping-type">Mapping type</label>
-        <select id="mapping-type" v-model="mappingType" class="fixture-input">
-          <option value="PRODUCT">Product</option>
-          <option value="SEARCH">Search</option>
-        </select>
-        <label class="fixture-label" for="mapping-external"
-          >External identifier</label
-        >
-        <input
-          id="mapping-external"
-          v-model="mappingExternalIdentifier"
-          class="fixture-input"
-        />
-        <label class="fixture-label" for="mapping-query">Search query</label>
-        <input
-          id="mapping-query"
-          v-model="mappingSearchQuery"
-          class="fixture-input"
-        />
-        <button
-          class="button button--primary"
-          type="submit"
-          :disabled="isSaving"
-        >
-          Save provider mapping
-        </button>
-      </form>
+      <ProviderMappingStep
+        :product-id="mappingProductId"
+        :provider-id="mappingProviderId"
+        :mapping-type="mappingType"
+        :external-identifier="mappingExternalIdentifier"
+        :search-query="mappingSearchQuery"
+        :products="products"
+        :is-saving="isSaving"
+        @update:product-id="mappingProductId = $event"
+        @update:provider-id="mappingProviderId = $event"
+        @update:mapping-type="mappingType = $event"
+        @update:external-identifier="mappingExternalIdentifier = $event"
+        @update:search-query="mappingSearchQuery = $event"
+        @product-change="loadProviderMappings($event)"
+        @submit="createProviderMapping"
+      />
       <form id="workflow-inventory" class="showcase-panel" @submit.prevent="createInventory">
         <h2>Add inventory copy</h2>
         <label class="fixture-label" for="inventory-product">Product</label>
diff --git a/docs/IMPLEMENTATION-STATUS.md b/docs/IMPLEMENTATION-STATUS.md
index 5f441c6..c2cf120 100644
--- a/docs/IMPLEMENTATION-STATUS.md
+++ b/docs/IMPLEMENTATION-STATUS.md
@@ -168,6 +168,7 @@ Remaining roadmap areas are approved external provider credentials/adapters, bro
 - Public catalog filtering now supports explicit Available, Pending, Sold, and All status modes plus a 30-day Newly added toggle through the shared search API and atomic controls.
 - The admin workspace now includes a responsive guided inventory workflow stepper linking Product, Sources, Copy, Images, Pricing, and List stages, with progress derived from loaded admin state.
 - Product identification is now an extracted `ProductIdentityStep` molecule with empty/filled Storybook states, while preserving the existing create-product API workflow.
+- Source mapping is now an extracted `ProviderMappingStep` molecule with Product/Provider/PRODUCT-vs-SEARCH mapping states, while preserving existing mapping loading and save behavior.
 - Public catalog sorting now supports latest manual/calculated market value low-to-high and high-to-low, with null values placed last.
 - Public catalog filters now collapse behind an accessible mobile disclosure, show an active-filter count, and provide a reset action while preserving URL synchronization.