give me some me more detail of what you want and i will see what i can do for you, no promises

it should be a plate that connects to the frame, to the 2 points where the standard footrests connect. The rest of the plate should enable the std. footrests to be moved back and/or up within, lets say 2-3cm back and 3 cm up (or what people want) from standard position, which would give you 6-9 threaded holes.
It should be bent or machined so that the rests wouldn't be moved outwards but only back and up.
The plate should be stiff enough so the rests are stable.

I have seen some plates, some time back, but can't find them again.

they could be bent out of stainless, that would be easy/cheap maybe a little heavy, but they could be straightened easily after e crash or machined out of aluminium, but then would probably have to be replaced after a crash.

A longer gearchange arm should of course also be found/made.
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom