Up for sale here is this used mode (sterero/mono/etc) selector switch from a Kenwood KW-50. This will work fine, though it may need a little Deoxit. Please see my pictures for details.

US shipping and handling is $5, and international is $18, no matter what quantity you buy. 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 Kenwood parts and other vintage electronics listed--feel free to take a look!