Try these guys, http://www.lakehurstpt.co.uk/http://www.lakehurstpt.co.uk/ bought 5 x 3/8 23 teeth sprockets, and 2 x 3/8 38 teeth sprockets for for £19.21.... inc delivery! and had the bits pretty quickly. You will have to pay by cheque when you first you use them though.

Suren