Welcome aboard.
Plenty of traders on here that can sort you out a clutch/flywheel package deal no doubt a lot cheaper than anywhere else, ...Clark Motorsport, Torqen, Tarmac Sportz, The Cougar Store just to name a few. All can be found here: http://www.350z-uk.com/forum/93-professional-traders/
I'd also consider whether or not you want to ditch the dual mass flywheel in order of a more performance orientated flywheel (lighter weight single mass). Just food for thought.