Hi Jastan,
You should look at Old Man Emu they do a 2.5 in lift for the KJ and it should be easily available in Australia. I have fitted one to my CRD 2.5 and the only advise I would give you would be maybe not to fit 790 coils at the front if you aren't planning to fit a winch as it does make it a bit stiff at the front. Our CRD 2.5 weighs less that 2.8, about 300 Kg believe it or not.
The parts are:
Front Struts: NS131 for CRD
Back Shocks: NS132 L - Long
Front Coils: 790 or 928 - 790 are the heay duty
Back Coils: 948 heavy duty
Fil.