just heard back from the guy in the rover club.
Unquestionably the man to speak to is Trevor Baxter of BXR cars, www.bxrcars.co.uk, and tell him colin robson recemmended him and he will be kind on the price, they just moved to Bangor so tell him to ring for a chat and to get the enw address.
hope that helps. he's a rover nut so may just be worth having a chat to on the phone. they tend to be quite generous with advice in my experience.
this thread may also be handy in future
http://www.the75andztclub.co.uk/forum/showthread.php?t=70360&highlight=bxr
paul