I think the '99 knob would work on that switch; there are only 2 kinds that I know of. The slider controls like we have, and the later ones that are all the round knobs. I know because I had a hard time finding the knob for my 97. Autozone/advance auto have a pack with a few different sizes in it for about $10, but none would fit on my 97. I bet one would fit on that shaft though.