Its pretty hard to find any smokin deals on a wheel as desirable as what you're shopping for. Every NC owner, S2K, 350Z, RX8, etc. that wants to track or autox runs that size.
For pure value, ordering a brand new set of TRM C3's in silver at $100/ea is pretty hard to beat. There are some lighter options, but they cost $$. Buy a wheel/tire package from Tire Rack (use the link on this forum!) and they come all nice and balanced, mounted, ready to go for a great price. A quick tape-off and black paint or plasti-dip will have you set, and should come in around $1000. Also, don't hold your breath for RS3's if they arent in stock.
If you MUST have something fancier, check the m.net classifieds.
Good luck!