Not my cup of tea either, but there are a number of 'kit-car' options for old RRs these days.
Tomcats, QTs, Dakars and Trakas are just a handful. It is a lot of work, but you should end up with a fun, if not particularly practical toy. Probably just the thing if the bodywork is falling off your RR.
Don't know whether I am really allowed to mention it here - so I'll whisper... someone built one with lots of photos over at the Difflock.com forums.
Cheers
H