Olympyk 950 super clutch

[50blues]

My Brother has a Olympyk 950 super that needs a clutch. He ordered one that was suppose to fit a Oleomac off Ebay but the threads are wrong. The new clutch was 8mm threaded and his is 10mm and left handed. He said it is 12mm thick and the drum is oregon part #28952.

Anybody have a clue what would work on his saw or a good one laying around?

Thanks