Using alternate model for the alternate costume help?

Hey UFE community! I was wondering if anyone knows a way to add a unique model (with a unique rig) as an alternate costume prefab? The problem I'm having is if the model is using a different animation avatar than the original. Would I just have to re-rig the model to work with the original model's avatar or is there a settings workaround I wasnt aware of?

I was able to make a new character to get the character's animations working on the new model, but thats only because i was able to set the animation avatar in a new character. Am I able to do the same for an alternate costume?

While I'm taking up space with a forum post, does anyone know any good tutorials to setting up a "costume select" option in menu?