Maybe off-topic, maybe not so much. Came across this today while looking for a Waltham #1 watch thread tap, (got one?). I've never seen such a comprehensive range of tap & die sizes & pitches over such a wide array of diameters. Even British & Whitworth standards.
They even have the #4-36 UNS that Steve Jelf needs for his headlight screws.
Tracy Tools in the UK www.google.com/#q=tracy+tools+mtfca
The tapsndies site has a big selection, but I didn't find the 13/32-16 size for pinion spool bolts and studs. I have the tap, but I've never found a die.