Hi mate
As the 350Z runs a dual mass flywheel its normally advisable to change this at the same time as the clutch. The Stage 2 that is on offer is fine for everyday road use and if ran with their lightweight flywheel is a nice upgrade, that combo is £675 including free delivery.
Alternatively we also stock the Exedy OEM clutch kit with uprated release bearing for £275, you would use this with the Competition Clutch lightweight flywheel at £350 or we also sell the OEM LUK dual mass flywheel for £345 if you want to remain with the stock setup. To be honest though most people upgrade to the lightweight singla mass flywheel.
All this is in stock for next day delivery as well as the correct Nissan gear oils, Molyslip additive, spigot bearing and everything else you could need for a clutch change.
Drop me a PM if I can help further
Ewen