The tin has 21 intermediate gears in it - all 0.250" thick with 50 teeth, 15 later types (with 3/4" boss, bronze bush, and equal recesses front and rear) and 6 earlier types (5/8" boss, no bush, deep recess on the front, flush on the back).
Chris - email me if you'd like one of these. I can probably also come up with a usable cam, half-time pinion, and magneto gear if you need them. I'd need to know if your magneto has the small or large taper.
Cheers
Leon