Up for sale here is this used Yamaha CA-810 lever switch. This is used for the muting or either tone switch. It is guaranteed to work great for you, though it may need a little Deoxit. Please see my pictures for details.

US shipping and handling is $5, and international is $18. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.

I have more Yamaha parts and other vintage electronics listed--feel free to take a look!