possibly this one m30 x 1.5 right handed thread
I cant think of anybody offhand, most are down South. I think your best bet is either send it away or try and do it yourself, its not impossible but can be time consuming.
I usually do my own now.
I have a duplex clutch basket 38t etc same dimensions as you mentioned, its an alloy sprocket with steel basket attached i am unsure if it is what you are looking for but pm me and i can take some pics if you wish.
thanks for that, so am i correct in saying its not an M49 rear wheel then? It has got the ribs on it maybe not clear in picture.
Where did you get the front mudguard stays from on your m80?