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.

I search the entire internet for a replacement part for my DeWalt miter saw. Discontinued by the manufacturer and I could not find it anywhere. I’m lucky to have found Kauffman Famiky Tool Repair. They had a brand new original part, and they shipped it right away. I can’t thank you enough for the excellent service!