Baer has them, I did the 2 piece D/S for the GT500 on mine, its the same brake, but no one has a listing for GTs with Brembo package.
Also did the 14in kit for the rear, that really looks nice, much nicer then the wimpy little rotor from the factory, just wish it had a nicer caliper.
I have about 300 miles on mine, feels the same, brakes the same.
I may actually be selling mine, probally going to trade the stang for a new truck.
3.73s and Brembo's
6 speed gear jammer, thats all!