yamaha parts and availability?

I have a DSPA-3090 that has a bad selector switch. Who can I get part numbers and order parts through for this unit. I can fix it myself and don't want to pay the high cost of shop labor rate.
Call 1 800 292 2982 and ask for parts dept. They have been superb on back up for me with M-45 and M-80 power amps. Parts are readily avail and reasonable. Max
I've gotten great responses from the Yamaha parts department by eMail.