Originally Posted by Itsalongwaydown
You could also try
NZ Car Rental 2000. I've used them in the past and found them very good.
^
I did try these guys. I got a old car, that was rusted out, with over 250,000 KM on it. The car was bad, and not worth keeping. I returned the car, which they luckily accepted, and rented from Hertz where I got a 2006 vehicle with 200 KM on it.
Before renting from some of these places, I'd ensure the AGE of the vehicle you are getting. Afterall you don't want to be stuck in the middle of nowhere with an old car that died.