I have emailed two Indian bicycle makers, Avon and Ti (Ti make a BSA) to see if they will sell me parts. Their old-style bikes have 32 spoke 28" front wheels, and 40 spoke rears. So, Bingo on the sizes, just need to see if they'll sell a couple of wheels to a guy in NZ

Does anyone know who a guru for early BSA serial numbers would be? I can't track these down on the net

thanks