Yes. MyRegistry.com allows you to add offline gifts, which are items from local stores or handmade products that may not have online listings.

To add an OFFLINE GIFT:

Hover over Things to Do

Click on How to Add Gifts 

Scroll down to Scan in-store barcodes

Tap the link in the last sentence that reads "Spot something at a store with no website? Add it with our mobile apps or by clicking HERE."

Click on the link to proceed and finalize