Check this deal out. $320.00 for 4 rotors.

http://www.classicdesignconcepts.com/shop/index.php?l=product_detail&p=135

LIMITED QUANTITIES!!! These brakes are an over run from a special project. They are a direct replacement and fit 2005-2010 GT Mustangs. They are priced to move so you might want to act fast!!!!!
Direct Replacement
Easy Install, Estimated time install time is 1hour with common tools
Fits 2005-2010 GT Mustang
Dynamic visual impact
Superior bite
Zinc Plated, Corrosion Resistant
Equalized pad wear
Consistent wet weather performance
Direct OE replacement
The same counter-rotational drilling used in professional racing
Designed to eliminate outgassing while minimizing stress cracks
Unprecedented three-year limited warranty against warpage and cracking!*

if you are interested let me know. i am working out a deal to get a group buy for a better price (around 275)