There was a guy on ebay called the adapter man.Used to have a good selection of shimano freehubs etc. at very reasonable prices.His listings also included cross compatibility.Worth a look.I do have a few NOS ones going spare,if you can find out what the hubs are?
Pics a big help .
No problem.Do you have any pics of the hub?Should be Shimano FH-M then 3 digits (or similar) written on it.If the front hub matches,will be on there too.Thanks captaincowelly. I'll search for him. Attached are some pics. The dust cap is missing from the last pic. I couldn't see any part numbers