G'day avagobro,
All of these places have their own websites with contact details on them. Eagle is in the process of interviewing as I type this, Origin will probably not be taking on any more low hour (less than 2500 + 500 multi) for at least 3 months, Air Nelson is overflowing with people already checked and waiting to get back in. Sunair, GBA, Air Safari, Southern Air, Northern Air, Air Napier, Air Charter Manawatu, Air New Plymouth, Taupo Air Services, Waiheke Air Services, etc etc are all smaller operators ie light twins/ singles.
Hope this is of some help.