Hello Zak and welcome to the forum,
I’m a disabled woman with cerebal ataxia and dexterity issues myself, and dexterity difficulties is something I take into consideration when reviewing sex toys. I also have a neighbour/friend eith cerebral palsy, so I do know how these things can be a problem for a lot of people.
Unfortunately I haven’t seen a masturbator with bigger buttons on it, which is a shame because like you, I think disabled people should be able to access sexual pleasure with ease.
My best advice would be to post something on the “pander to me” thread: Pander to me! .. PRODUCTS ONLY
Hopefully together, we can start making orgasms more accessible for all.
I wish you the best 