I think if you ask any of the good auto electricians, they will have a box full of cintered bronze bushes all sizes. You'll find one to fit easily, I wouldn't think it would have to be a special part number for your starter.
Gav ----- hapi revmaster, and the starter needs some work. I have tried talking to a few starter places and they can see the starter listed in the bosch book. The part i need is the front bushing,