Dremel, since purchased by Bosch, has discontinued producing some on/off replacement switches for some Dremel rotary tools manufactured over 25 years ago.
Kauffman Family Tool had 2 NOS switches in stock and emailed images of both to confirm their correct application. From where I'm sitting no other online company carried this particular rare switch.
Kauffman Family Tool runs an essential business the way most American companies used to operate long before computer algorithms changed the business model and eliminated the emphasis on customer service.
Suffering the humiliation of dealing with a dehumanizing monolith like Amazon is no longer required. Kauffman Family Tool Repair now has that power and it's doubtful Amazon will ever come close.

Sent in my 1990's vintage Porter Cable EHD Screw gun for repair after it stopped working. This repair was completed in a matter of days with the gearing and the clutch assembly checked for lubrication. The labor rate and was very reasonably priced. The owner Kellie kept me notified of the progress and notified me with the tracking information when return shipped to me. A very positive experience and I would highly recommend Kauffman Family Tool Repair!

The ONLY place to find obsoleted parts at reasonable prices. Vintage power tools (50+ years old) are workhorses...solid, dependable & hardworking, but in order to keep those tools going, we need places like Kauffamn Family Tool Repair. In-stock parts for a 1972 Milwaukee rotary hammer ? CHECK! Parts for a 1975 Milwaukee circular saw? CHECK! Parts for a weird Bosch jig saw? CHECK! There was an answer for every part that I asked about (although one or two actually weren't available, but that was the minority). To go even further, there were multiple emails asking for clarification on parts that I wanted (when there were different versions depending on build-date) or helpful suggestions on my order. I have already recommended KF Tool Repair to some friends and I will continue to do so. SUMMARY? Reasonable prices, great selection of hard-to-find parts, out-of-the-world shipping charges ($10 flat rate shipping compared to the $96 a competitor wanted for the same parts!), and gReAt CuStOmEr sErViCe!