A short time ago a poster was looking for a special tap. I just
got an email about this company. I don't know anything about
this company, but at least a source for "Acme, Acme sets,Tandem
Acmes,2G, 3G Acme ,Carbide, Cobalt, Trapezoidal, British
Whitworth, Pulley, STI, Pipe, NPT,NPS,NPSI,NPSM NPSL,NPSF,NPTF,
Form, Extension, and Metric."

http://www.tapcousa.com/default.asp

Anyone dealt with these people?