Wai - another option for a full standalone ECU which supports DBW is the Hydra.

More details here - http://www.hydraems.com/ & here http://www.elementtuning.com/technical/element_ems.htm

AVO are the Australian Distributor - so you can get them from Melbourne - cost is about $2200 (i think) - any tuner can tune it.

I'd recommend speaking to AVO about it. I don't know if anyone in Perth is using it, but they are in Melb & certainly in the USA.

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MY09 Evo X - 1.6bar@3500rpm - got lag?
Barbagallo - 56.03 (S); 1:08.09 (L)
Collie - 50.77
Possibly the most under-driven Evo X in the world??