Why not Brendan's bike? Don't think it's a real SP but it seems pretty well sorted with all the goodies and I believe has dry clutch motor with fully adjustable upgraded suspension. I was thinking about buying this bike myself as a track only bike, but decided to go another route as I already have a pristine 1990 MC21SP in the stable.

http://www.nsr250.net/forums/viewtopic.php?t=12511