I have not had too much luck finding any information on replacement buttons for my OB-XA. I have a track button which works but the LED is dead. Any information here would be appreciated!
Possible replacement
The best I could find is a button made by Digitast. One of their models is a rectangular shape that looks identical to the OEM Oberheim buttons. Seems hard to find in the US so I ordered a few from Eurpoe. No idea if if they will work but I'll report in when they arrive in 2= weeks.
Below is a link to the button specs.
http://www1.futureelectronics.com/doc/C%20&%20K%20COMPONENTS/SRKL-BK.pdf
James