Well I'm gonna be no use then. Though I figure it would be cheaper to order from sites based outta Australia? You might still get hit with the duties and charges but prices should be more comparable no?
I'm Canadian and only order from U.S. sites when I have to (or if they're cheap enough, or our dollar is closer to par (RIP)).
Australia is pretty similar to NZ from what i've heard. the stores that sell them are mostly local and don't ship overseas.
I usually manage to snatch a pair hear and there from Amazon, even then most don't ship down here.