If the old one isn't working, did you try some electrical contact cleaner and let it soak for a while. It worked for my wiper, headlight and flasher switches
Anybody know if one from a 73 scamp work? If so I got one. would let it go for a few bucks.If you want a new one have you checked with year one or the paddock ? Their stuff is generally pricey though .
The paddock doesn't list one. No one does. Will try the other suggestion. It does try to work on the second speed sometimes so maybe a good cleaning will do it.