Rhodes Chroma Polaris

I have a Chroma Polaris that is not getting any use. It works,  
however the ribbon cable connecting the left side to the right side  
was severed for some reason (not sure why, it was like that when i  
got it) and therefore the membrane buttons on the left side do not  
work. Also the assignable slider is loose and doesn't work (probably  
needs replacing) I was considering replacing the ribbon and slider  
myself and selling it, however i thought i'd check here and see how  
much it could sell for in it's current state and how much it could  
sell for. Also if anybody has any ideas on where to get a replacement  
ribbon and slider.

Thanks,
.jt