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.

Great company to do business with. I was concern about getting a replacement for my very old, but versatile milwaukee drill. Not only did I get the part, but received it in 2 working days (remarkable). Thanks also for the chocolate mint. I can most assuredly say that you all are perfect examples of what customer service is all about..
thanks again
john