I also bought my GT500 spoiler from The Spoiler Store on eBay. I had to pay a bit more since my car is not one of the stock colors, but it still didn't take long to arrive. I was very impressed with the color match and fit, yet it's not perfect. I can see a little waviness in the right lighting conditions and the paint is a little dry and rough-textured on one corner. Still, these are things you have to really look for and even though I'm a perfectionist, I can live with the minor flaws very easily and don't regret buying it.
I still can't get over the fact that their paint job matched the color, texture and metallic density so closely that I can't see any difference even though my car was 2 years old when I got it.
2008 GT Deluxe
Dark Candy Apple Red, 5-speed
Interior: MGW short throw shifter
Exterior: Cervini Concept Hood w/Ram Air, GT500 Spoiler, Rear Black-out vinyl, Sequential Signals, MAG Mirror Covers, Painted Stock Wheels
Under Hood: MAG plenum cover / fuel rail covers / radiator extensions / shock tower covers