I had just cause to pass through Oamaru and Waimate airfields last Saturday (02-11-2013).
Below is what I found.
Below is Heliventures NZ Ltd's latest addition : The MD 500N NOTAR ZK-IEN (c/n LN047) It was listed on 223-08-2013 - ex Canada. It has a matching colour scheme to its partner ZK-HEN3.
The North Otago Aero Club has been operating this Cessna 172N Skyhawk ZK-EIO (c/n 71937) since July of 2006.
An earlier post on this Cresco ZK-LTS can be viewed at:-
I think this Cessna U206F ZK-DKB (c/n 02170) is based at Alexandra. It has been with Quinton Meyer since 17-01-1986. It is seen here at Waimate (International) Airstrip.