Beno, check out trademe at the moment, there is a guy from Hamilton selling nitro boots, my friend swears by the lacing system in them and I will probably get some off of him before the start of the
season. I'm fairly sure they'd be a bit better priced than what your currently looking at buying too.
Hope that helps.
EDIT: And yeah, your right, NZ prices suck...
Never Summer SL153 & Atomic Hatchet 159