Hi,
Just some info...
I've been running a full Power Brake setup for about 50 000km and been VERY happy (this is on a 2008 LWB).
The rear pads are Bendix Heady Duty DB1200.
I noticed that these pads are also used on Land Cruisers (70, 80, Prado 90, Prado 120, Prado 150, new Fortuner, and FJ Cruiser).
So if you're looking for rear pads for a Gen 4 LWB in a hurry, you can technically get them from Toyota - part number 04466YZZAM for R829.
Or Midas does ATE (model ATE689) for R650.
Cheers,
Greg