Good day to you,
Effectively, most of penis masturbator aren't made for well endowed men.
You can forget all of Fleshlight / Kiiroo penis masturbator, or all that are inside an ABS case.
You may try some small/medium sleeve like the one from TheHandy but it can still be too tight.
I can think of one but it's not really a masturbator even if you can use it like this.
It's the Pulse Solo Interactive. It's more a vibrating sextoy for penis but with the shape it have, it can be use to almost every shape or girth of penis.
I made a
review of this toy. It could be interesting for you.