Hi Jim

I've always found the best and cheapest way to get trailer stuff is online. My favourite supplier is Western Towing, you'll easily find them via Google. Also very helpful on the phone if you have any queries.

The main problem is working out exactly what make of running gear you've got. Historically, different gear has been used at different times, and I'm not very familiar with the M trailers myself.

I'm not sure I'm being a lot of help!