We are bringing in what has to be the definitive 1/72 Tugan Gannet. Not cheap at around $60+GST but a very nice kit. It's in military form but they were used in civilian service also, mostly carrying simple registration letters, easily made.
Best reference for civilian ones... very nice blue and silver VH-UVU can be made OOB with appropriate decals.
http://www.goodall.com.au/australian-av ... gannet.htm
The model........
http://www.britmodeller.com/forums/inde ... -released/
Very limited run so if you want one,order here.
https://www.redroomodels.com/red-roo-ki ... 172-scale/
Another manufacturer is proposing a Piper Tomahawk - again, resin, 1/72 and probably not cheap. I had a trip in a Terrorhawk once - didn't know about the nickname and its origin until well afterwards.
Another limited run - even more so than the Gannet.