hifi engine

Fisher CC-3000 "Function" switch

Greetings: I have a Fisher CC-3000 Control Amp that needs a "Function" switch. So far my suppliers do not stock part. Sources Pls? I also would like a Schematic. I also have the FM-2421 Tuner, EQ-2322 EQ, BA-6000 in the shop 4 sale. The units R cosmetically good and functionally in working order after I repair the CC-3000.