This Is something I caught wind of a while ago but haven't explored.
11-14 Mustang GT non-track pack comes with a 13.25" x 1.18" rotor. Supposedly they will fit and allow the pad to solidly fit on the face of the rotor. You would need to run a .100" spacer behind the rotor hat (or machine the brembos) instead of the 0.075" spacer used now.
Very interesting. Does anyone make a bracket kit? Also what size are the pistons?