Cheers for the replies and welcomes!
Budget wise, looking around i've seen some with the NISMO kits for around 15k, and some without for 13k (<40k miles, GT spec coupe, manual , UK model) - however as you've noted, they can be few and far between. If the cost of a retro fit (and spray) would be around 2k, then it would be ok...
I was thinking of a custom respray anyway, so it might be a sensible option to retrofit, any ideas on what a decent full body respray might cost? I'm based in Hampshire if you've got any suggestions.
Oh, and just a check, the new Road Tax changes coming in, do pre March 06 350z's fall into the lower category due to age? I seem to remember seeing it stated somewhere that cars in class G registered before march 2006 would not be scaled up to the new higher tax classes? Seems a nice little loophole (although i'd miss out on the revamped 313bhp model... )