This kit for the VE Commodore sells for AUD$10,500 and is reportedly good for 380-410rwkw with a dual 3in exhaust on 8-10psi boost.

A tuner I know has estimated that he'll be able to do the complete supply, install, and tune (with a few other bits added to the basic kit, like stealth fuel system which is a surge tank with twin internal pumps for almost zero noise and joined up to the current exhaust system with 2 bar map sensor, 60lb injectors) for about $16,000.

On the first installation he did, he managed 407 rwkw at 9 psi boost and saw 434rwkw/582rwhp on his dyno using 12psi boost. Peak boost arrives by 3300 rpm. The output from the dyno is attached (3300rpm is 130km/h).

I don't know what the exchange rate is, but $10k US for a turbo kit seems way overpriced.

i dont know, i've seen turbos for 3000-4500 so 2 with all that may not be too tough to swallow if its reliable and follows through