Quick Order Form by Unique Product Lookup

Go to Products > Attributes

First, create a custom attribute for your Unique Product Lookup with Text Type, and check the box Unique Values Only.

Go to Products > Quick Order Forms

Here you may change the Product Lookup Field from SKU to your unique product lookup attribute.

Add your Products to the Quick Order Form

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Only products that have a value set for this unique product lookup attribute can be saved and displayed to the customer. For Configurable and Bundle products, only the parent product needs to have a value.