I've had this project on the back burner for quite a while. Finally got around to designing the hub. Uses 3rd gen RX7 rotor (294x22) and 2nd gen 4 piston aluminum caliper. The good think about the RX7 rotor is that it has a large diameter to give sufficient brake torque, yet isn't as thick and heavy as the P-car stuff. See here for pics:
http://www.vdubcustoms.com/Wedo/mazdabrakes.htm
The kit will be bolt on to stock drum, cb drum or stock super spindles.
I'll post the caliper bracket as I get it manufactured.
Easy,
Lanner