Thank you so much for taking the time to help. I think the issue is that I’m using the built-in Wix store, which doesn’t seem to allow me to add custom columns in the product database. Because of this, the only element that I can actually use for the filter is the product’s ‘Ribbon’ (that I can set to ‘widget’ or ‘gadget’), but entering anything in that field ends up showing a graphic on the page that I don’t want (and prevents me from using the Ribbon for its intended purpose in the future). So, it seems, right now, I may be out of luck outside using some pure Javascript implementation or using a completely custom product page. Unless you have any other thoughts.
Thank you again for your help.