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I have a setup like that from DRM (Doug Rippie Motorsports www.dougrippie.com ). It's an aluminum hat with a Coleman 13"X1.25" slotted rotor. A couple things, though:
1) not cheap. It was something like $325 per rotor.
2) Since the rotors are thicker than stock, you have to get shortened pistons for your calipers. Swapping the pistons is pretty easy if you're familiar with working on brakes.
3) DRM is sometimes not great at processing orders quickly. You can also check with Exotic Motorsports ( www.exoticmuscke.com )-- they carry a similar setup.