Does anyone know of an aftermarket gas cap available for this bike ? Doesn't have to lock.

Ya know, Just thinking, (A-Yep, I know it's 'dangerous')

But those here, who have a 'clean' workbench.
Ask for, 'caps', (no locks/keys), just, caps.
Take them apart. And fabricate a little, 'wingy' thing,
To just turn by hand. (so it, 'locks', in place, but doesn't need a key)

When I get a 'rountoit', and some caps to play with, I may even do it.
(And the workbench cleaned)

BUT, Don't hold your breath !