Can I create a new listing that is a “Kit” that contains 2 of my original products (each have their own listing) and then only fulfill them with FBM (since I don’t have unique packaging for the kit)?

This is something I’ve done with a bit of success on Etsy and was wondering if it would work on Amazon as well. My thinking is it wouldn’t work with fba because I don’t have a separate package design for the kit that would make it one singular product, but if I’m fulfilling the orders myself then I can just put both items in one shipping box. For the listing I would have images of the the items together of course.