Hey Philip!
You'll need some custom development here, and I can suggest a Shopify Expert to help you out.
Shopify Experts is an online directory of eCommerce experts that can help you run your Shopify store. From customizing your theme to building custom applications, these experts can help with everything and anything related to Shopify.
Let me know what you think!
Matthew Buttler
Guru
Shopify Inc.
