Seriously, if you contact Jim aka Slotts. He can point you in the right direction with everything you need, he is a straight shooter and garuantees all of his work, his variable switches are better than NOS for real, he replaces the internal core with a stainless steel core to avoid corrosion, his stuff is the best. We have had more than one member shop around on e-bay trying to go cheap and ended up spending money on the dud switch on e-bay and then buying the best they could get from Jim, i am not blowing smoke, his restorations are the best and he can show you video footage of your parts working before even sending them back.
Do yourself a favor, switch to JSR for a real turn on
Sorry about the pun, i am just having fun. His work really is all that.