I was planning to run F8x rotors in place of my brembo rotors when they need replacement. I have a 365/345 brembo kit on the car now and the brackets modeled up already, just need to get a pair of F8x rotors complete the rest of the dimensional changes for the conversion, at that point they would be like an OEM GTS kit (assuming the rotors are the same). I could work up similar brackets for use of the F8x calipers on our platform if someone wants to supply a rotor and caliper for the project. Furthermore if enough people are interested in a group buy I would be happy to machine them for everyone as well. Just did a small run on some 135 - e36/46 caliper retrofit brackets last week they are out for hard anodize but here is a pic of one in raw state, along with the 365/345 E9x brembo brackets re-engineered.
-Adam