Is there a way to convert a BP to an Interface

I’m in the situation where an asset that I got from the Marketplace has effectively hard coded the type of anim BP used in the character BP. What I want to do is to use an Interface instead so that I can use the anim BP with another skeleton (i.e. the new anim BP is a copy, not a child, of the dev’s anim BP). Does anyone know of a creative way to copy the functions to an interface BP without having to create each of them manually. Thanks.