Mugen_is_best

No, but I know Rockstar Garage sells 'em. I picked up a set of used Girodisc rotors that need ring replacement. It's $400 just for the girodisc rings and $500-550 (I forget) for the complete Stoptech aero rotor.

From what I can recall the girodisc cut the weight in half. The aero rotor is heavier than the girodisc, but lighter than stock. So from a performance standpoint the girodisc have an advantage.