True enough about the t-case e-brake. Howeverm for a point of reference, my '74 FJ55 Land Cruiser had a t-case mount drum! parking brake from the factory. It hardly ever worked because any sort of oil off the engine, tranny or t-case seemed to find it's way back into that drum and the oil soaked shoes would not hold very well.

I think the Front Range kit uses turned down solid axle front rotors for the Supra calipers. The mounting brackets are not that complex, just two tabs off the backing plate mounting bolts (of course in the FF kit, that is off of the spindle mounting bracket).