Well the hunt continues...
@Major Ledfoot in my haste I didnt realise that the one you had was for the right hand side of the car. I need the left hand side. I did try fitting it regardless but it doesnt fit. Dont suppose you have a left one?
Interesting for those playong along at home, the one I got from @Major Ledfoot is a slightly different version yet again. Amongst minor differences, it has a smaller gear. It does however still bolt up and work the same. I havent yet compared the internal gearing to see if the overall speed is different or not.