Can't you just replace the rims Fi? Admittedly the new ones would need to have the same ERD but not an impossible job, Shirley?
Apologies to kfilay for thread hijack - I can't help with your frame, sorry.
FN - me too
This is what I was thinking but the old style, screw-on freewheel-in-the-sprocket-cluster mean I'd be limited to 6/7 speed and I assume non-indexed shifters or at least, downtube shifters. Although that's not a problem.
I have a vague memory that the bike had Suntour derailleurs worked by down-tube non-indexed shifters (actually I probably have these still as they were a beautiful design - really smooth and sculpted compared to the Shimano ones of the time which were covered in all sorts of bumps and roughed-up surfaces - presumably for 'grip').
As I type, a plan is forming as I still have the frame & forks (hand-built by Avocet of Perth, Western Australia in 1987 to replace their 1983 frame that I wrote off in an accident) which the wheels were last on but it's got a problem with the weld on the BB lug and I've kept it (and it's replacement Chas Roberts which has a crack in the paint on the underside of the downtube behind the head tube) so when I retire and take up frame building (don't laugh) I'd have some tubes to practice on. Maybe I should look into getting someone to renovate the frame - it's 531 or 531ST with rather nice lugs. It was always a superb bike for long distances and I really wouldn't mind having it back on the road. It also has (slim) mudguard clearance as well as mountings for them and a rack.