[nznog] OT: VoIP <-> PSTN gateway operators in NZ

Hi, Sorry for the OT post, Is there anyone in NZ operating (in production, or close to it) a VoIP to PSTN gateway? Preferably SIP based? If so, could they email me, or email me a contact from the company?. Im looking for an allready established network rather than creating my own (expensive :o) Cheers Rob