I used a Warrior brake system on mine. Bracket has three metric nuts welded for spacer, caliper bolts to bracket. Mine is a pre 03, I used existing rotor, it doesn't matter if both caliper and rotor are floating. My resivoir is up by the air box on simple L bracket that attaches to a tab on the frame by front of air box. I do have to admit that I need to re-do it slightly. I have too long of a pedal extension because I mounted it to the frame down tube rather than lower sub-frame tube, thought it would be more protected there. When you weld on the frame unplug all wires from stator, cdi, and volt reg, put ground clamo as close as possible to weld. The hose is long enough. If I have to change things when I finally get a Banshee axle, so be it.
Awk's system is great for a plug and play, especially if you lack fbrication skills or tools.