Vintage Synth Repair

I'm repairing a Roland JX-3P that fell, making the pitch bend 
joystick useless. I opened it up, and discovered the guts of the pot 
ripped in half. I first tried supergluing the board back together, 
but the taper is still broken. I figure I should replace the pot. 
It's kind of weird I think (pot wise) because its center tapped in 
the taper. It's value is 100KB. It has 4 lugs. The part number is 
302N. It seems like this pot would be common for this application, so 
does anyone know where I could find a replacement? Thanks!
-Mike Walters
www.mysterycircuits.com