hey, I found a company online at
www.sportscarrentalsonline.com that has a cobra for hire at their Brisbane depot. A look at the sydney base didn't show a cobra but maybe they can organise something for you. Their phone number is 1800 170 100. I'd lend you mine but I haven't even let the wife drive it yet! If you could see the condition of her car you would understand why...
Cheers Dave