Just some info for you, I was at a shop this past weekend and bought some from a guy that really helped me out get some for my cousins G20 in Michigan. The guy got us a good price, got em shipped up to him, and even called to make sure they where there on time and in good condition. Not sure if they can help you or not, but check em out, possibly they could get you something like what we got for my cousin, 18's with tires and shipping for like 1250. Check em out if anything. Here's the website and phone number. www.teamspeedzone.com
Talk to Vishal, I think thats the guy that can help you out.