www.buyfordmotorsport.com is where I got my 98 Cobras from. They ran me $109 apiece I believe. They have good prices on other wheels as well. Also check out www.gefracing.com. I've dealt with both companies and they both are good to buy from. You might also try your hand @ www.karkraft.com b/c they seem to have decent prices on wheels too, but I have never dealt with them personally.
im gonna go ahead and assume that by the dark grey new cobra rims your talking about the 10th anniversary cobra rims...just incase n e one was confused or if u havent tried searching for those(as opposed to putting in a search such as "dark grey cobra rims")