This is what I got for mine:
Car Reverse Rear View Backup Camera for Nissan 370Z 2008 2011 Mode Z34 | eBay
Installed it on the Drivers side Tag light, and it was pretty dead center in the rear of the car. Picture quality was very good in the day time, and grainy as expected at night, but still very clear. It had line markings that I measured at 1ft and 2 ft.
Simple enough install, positive, ground, and HU RCA connector. Tapped the power wire into my reverse bulb wire so it came on with the reverse lights on the HU. Great little unit for the price.