A quick drive around the terminal area at Woodbourne back on the 5th gave me these three specimens.
Bombardier DHC-8-311 ZK-NEW5 (c/n 648) has been with Air Nelson Ltd since 23-10-2007.
Pilatus PC-12/45 ZK-PLS (c/n 363) of Sounds Air Travel and Tourism Ltd has been on the registere since 16-03-2015.
And the Cessna 208B Caravan ZK-SAA (c/n 208B0862) also from Sounds air , has been around since 02-05-2007.