Hi,

Another thing to remember is that Car Hire places give you all these for free, so if you're hiring a car when you go out you'll get a whole pack of Maps/B&B listing and other NZ books. Might save you some cash.

I'm not sure, I could be wrong when I say this but I think the stands in AKL airport had freebie maps as well? I'm sure someone will correct me if I'm wrong.