I'm currently in the debate between which rear camber arm I would like to run, and I came across this camber arm on ConceptZ:
NRG DME-N001 Rear Camber Kit 09+ 370Z - Nissan performance parts
NRG DME-N003 Rear Camber Kit Nissan 370Z 09+ - Nissan performance parts
The first link is for the part number DME-N001, and the second is for DME-N003. After cross-referencing on NRG's website, the N003 is for the 370z, and the N001 is for the 350z. That being said, the N001 is about $60 dollars cheaper, and as far as I know, the 350z uses the same arm.
These arms look pretty, at least.
I'm just not sure about the long term quality, and since I'm still debating if the cost of the SPL arms are worth what I would like to do with my car. My current bias is towards the SPC arms. They seem to fit the bill for a street car, and many people run them on the street with no issues.