I just replaced my factory headlight bulbs and I don't need my factory ones. I took them off the car with 300 miles on the OD. I have not even driven the car at night yet cause summer time in Germany the sun goes down after 10pm.
$50 bucks shipped anywhere in the US. Paypal fees included!
Here are the bulbs from the dealer:
BULB-XENON - 370Z (Z34) 2009+ :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com