Watch what you do changing pad material I have Lucas brakes on my T4 ex ambo auto & I did a down hill from hanging rock NSW with an empty van with a set of EBC pads on 67000 klm disc rotors that were still fat enough to pass the replacement size & got to stand on the pedal real hard by the botom .
Next trip down the montain I locked the trans in 2 nd gear & no problems so as the amboes did I replaced the rotors & the pads after market from the same Government supplyer they buy from for under $200,00 for the fronts .
The ambo service changed pads & Rotors @ 30000 Klm as they get a hiding in their work with .the weight they have on board the rear brakes get to take some of the load via the sencing device on the rear suspension I may look into that soon as the rear is not doing any work with the heavy suspension coils & shocks fitted to these machines mess with the bias valve that only turns on when its loaded wich is not a lot in my case ,

You as always need your Vin # when shoping or you will get the wrong rotors or pads for your T4 been there done that .
TC