Product Variant issue

Site URL: https://www.mikechattem.com

I'd like to add artworks to my squarespace store and I'm trying to offer optional variants on unique items. An example would be listing a work on paper but giving the customer an option to have the work mounted on a panel for an additional charge. The problem is when I try to add the mounting variant, squarespace creates two different items changing the stock and availability of the item. With this set up if a customer purchases a unique work on paper and choses to pay extra to have it mounted, my store would still list the unmounted work on paper as in stock in my store.

I saw that adding a form to my products could solve the stock problem but then I wouldn't be able to add a variant fee. Is there a way to add custom variants to unique items while keeping it all one product?

Much obliged.

Hi there, were you able to find a solution for this? I'm in the same boat!