I went to the wreckers and found a set rotors, calipers and caliper brackets that are from a ford explorer, i found the caliper brackets fit onto my 9" but the rotors had to be redrilled for the wheel stud. and the center of the axle doesn't fit into the rotor i will probably machine the rotor (as oppossed to the axle) to fit. and hopefully i will have a pretty cheap (parts were about 120 bucks, on 1/2 price sale) rear disc kit. if money isn't an issue you could get a kit from ssbc or willwood. i have installed both for others, and both are nice.