KVR Performance can build you a big brake kit for your FJ.
I already have an equivalent set up. TRD pads, centric rotors, stoptech brake lines. However as good as this system is I do not wish to tax it too hard with these factory calipers and I am limited to pad choices. Since the TRD kit is produced by stoptech and the caliper is an st40 unit with lots of support I feel this is a far better option for my needs. Btw I have a 4Runner