G'day hoss
Possibly one lead you might make is contacting the Royal Aero Club of WA in Perth. The last I heard was Capt Reg Atkins still has an active invovlement in the club. He may have some further help.
You may know me, I was in the class of Fitzroy Crossing 1999-2000.
Cheers
SPECI
PS Let us know how you go.