Lookind to do some R&D on a hydraulic caliper conversion for cable caliper bikes

I am in need of some calipers to measure and see if they can be retrofitted via bracket to a cb125/cb200 to convert the calbe driven to a hydraulic.

Probably only needs to be single piston but some small dual pistons might work.

Not looking to pay for much just looking to get some donations for the good of the cause.
I know some people have old calipers sitting around that are junk. Just need them for measurements they dont need to be operational