Stay far, far, far away from Duraflex. You will be very disappointed in it honestly, fits like crap and very cheaply made.
Used OEM, Seibon, I think Carbon Signal may have a few good ones also. We run the Aero Jacket Spoiler on Forsbergs car and it fits real well ( And looks cool! )
I do have a Seibon NSM wing sitting here at the shop I would be willing to cut a great deal on if you like that style!
NSM-style carbon fiber rear spoiler for 2009-2010 Nissan 370Z