Why not just mod what you got, my black tranie's brakes will front flip my truck if I jam them on.
Just double up on the pads & cut down a retractable pen spring and put them on the bolts between the pads.
Also sand the copper piece slightly to compensate for the extra pad.
You can also put a cut down servo saver or other stiff spring in place of the fuel tubing on the brake linkage.