Thanks for the help guys, but I ended up buying the yellow turbo-charged Spyder that was floating around on Gumtree.
To answer the question of why I didn't grab any of the others, I really needed something that had all the engineering already completed. The police in my area are fairly aggressive when it comes to modified cars, so unless you have all the paperwork to back you up, it ends up costing you a fortune in the long run.
Maj, your car would have been perfect if it was finished :(
The Spyder was only engineered for the ACT, but the guy who sold me the car was kind enough to knock the price of re-engineering it for NSW off the total. Fingers crossed, it should be engineered and registered by Friday!!!