Jay, don't loose faith at the first hurdle!!!
I have got some Cobra Misano's sitting in my lounge at the moment waiting to go in!!! Cobra don't do the subframes so I got a set of Bride subframes from Adam @ Z1 and it is a simple modification to the subframe to make them fit the Z!!!
You can see my ones here
http://www.350z-uk.com/forum/viewtopic.php?t=6278&start=0
Should be in by the end of the week so i'll post some pics of how to fit them and the end result!!