http://cel-fi.co.nz - Local agents are http://www.powertec.co.nz/store/mobile-repeaters.html
The ones "for 2Degrees" are listed as $894, which as it turns out is exclusive of GST although there's no mention of that on the website which is a bit dubious. The same unit in the USA is US$575 (About NZ$800 Incl taxes+fees). Not exactly a small difference assuming there's no actual difference other than the power supply.
It appears they're not certified for Telecom/VF yet which doesn't instill confidence. (No TelePermit, certifications are all either international or US-centric)