ZK-NEA!
Boring rego's, see on caa.govt.nz that there are a bunch of NE* series reserved.
Here's some interesting one in that range that are currently being used, and one very interesting one - the last!
NEI: C152
NEL: Eipper Quicksilver MXL
NEN: Zenair Zenith CH-200
NEV: PZL-104 Wilga 35
NEZ: De Havilland Canada DHC-8-102 60 Air National Corporate!!
I see too that there are two NG* left reserved!