Vintage Synth Repair

Hi,
  Does anyone know the pinout for the GEM Real Piano Expander's 
display. It has a 14 pin connector and it looks like the backlite is 
included in the connection. This is a strange setup with a 3" wide 
ribbon connecting the 2 boards together. Since this exact display is 
not going to be available it probably would be best to sub it. I have 
pictures of it I can send if necessary.

Thanks in advance, Fran