This site :
RegoSearch | VH-NLP Australian Aircraft Registration Details
Shows it to be an A9 which is gippsaero modified PA25
Western Aerial is shown as the operator.
Skuawk7700, sorry if this offends your sensibilities re the violating the lack of recent incidents/accidents but real people involved here. Sad but true that the Ag industry pays in blood for your abundance of high quality affordable food and fibre. At least be grateful and show some appreciation and condolences. I find your comment facile at best and offensive at worst. I'll give you the benefit of the doubt but it's not a nice time to be making such statements.
To the Todd and the guys at Western Aerial, sincere condolences at this time of grief, and heartfelt support to family and colleagues.
HD