speak to BigPhil at ESR or send him a pm. Does a very good price for the clutch and can fit them too.
some more info here
http://www.350z-uk.com/forum/viewtopic ... ght=clutch
and
sorry can't quite see where this is all going kev and what ya trying to proove. The Z is a sports coupe and not an out and out sports car. If weight is such a big issue, do you not eat before every time you drive the car.