Rhodes Chroma Polaris

Hi guys,

I just acquired a Fender Chroma Polaris for $300 (a very reasonable price, I thought), but the catch is that the left membrane panel is non-functioning and the linear potentiometer for assignable controls is broken off and the lowest octave C-sharp key is missing.

The potentiometer and key will be easy to rebuild/replace, but are there any more membrane panels available for sale?

-Joshua Coburn