I've found some replacement parts on ebay
http://cgi.ebay.com/ebaymotors/ws/eBayI ... 7911016122
Guess this is. I suppose I could strip it down, see what I need and then wait for these from the USA. Anyone know where these can be bought in the UK?
Also, speedy cables instrument division tell me they will repair it for £50 + vat and carriage. They responded very quickly and seem like a professional group, anyone any experience with them. I fancy trying this myself, especially as I've been offered advice on tap from a friendly experienced DDKer

just down the road but I might chicken out if I can't get the bits. Speedy cables price seems reasonable.