Vintage Synth Repair

Hello -- Been a little while since I've had to repair anything, but I've recently acquired a Roland Saturn SA-09.

They look something like this:
http://m.matrixsynth.com/2010/11/roland-sa-09-analog-synth-organ.html

...except the Accent switch on mine is broken!

Any advice on where to get a replacement switch.

Links to any relevant documentation would also be especially welcome... I searched Google for awhlie and didn't come up with much, but I'm sure I can replace the switch if I can locate the replacement part. Thanks in advance! -paul