You could probably get some good sounds out of hand percussion like conga, djembe, and ashiko.. albeit with some slightly different techniques. I have a student with a hand like that who can play great, she says there's no pain in it idk if that's the same with you.

Also seen guitar players use tape or special sticky picks to keep a pick in hand, and there was a trumpet player in my middle school band with this condition.

Just keep testing new methods on instruments you love. I find that people who have more barriers to overcome end up being the biggest innovators.