yeh when you mention that its gonna be 900...prob not...
My brother just got 18x9 2003 cobras for his 04 v6 with tires and free shipping for like 865 and lug nuts/ wheel locks for 20 bux at autobarn

 

They do look good, another thing you might want to consider is contacting them to find out how much these rims weigh. If there heavier then your stock ones, you will feel the difference in the car and in the long run, it might not be worth it [:'(], just food for thought.

 

Somebody at work has '04 style Cobra wheels on their '05 V-6.....one word....goofy, to me they just don't look right on the newer 'Stangs, but it doesn't help that he has 275/40-17 tires and with the New Edge offset on those wheels, it just doesn't look right(IMO). Maybe some Fanblades? I know plenty of Ford dealers that modify their GTs and have left over wheels.....maybe ask the dealer where you bought your car? Maybe they can work something out, doesn't hurt to just ask, does it? Well, best of luck on whatever you feel is best.