Most any switch from most after market suppliers will work just great. they are listed inmost model mags etc. as well as tower. Most cost around 6.00 to 8.00. Just make sure the wiring is for your brand radio. The only one I know of that has different wiring is
airtronics. I have bought some for their radios that had the polarity reversed. If you buy a new switch harness just order one for futaba J or hitec,JR etc.