Hey Steffo.
Saw a listing of a photo of one of them https://www.flickr.com/photos/magictyger/15719218916, which down in the photo details, said:
GPS Latitude Ref - South
GPS Latitude - 26 deg 52' 57.23"
GPS Longitude Ref - East
GPS Longitude - 152 deg 10' 52.06"
GPS Altitude Ref - Above Sea Level
GPS Altitude - 379.6000061 m
You up for a bit of navigating
Or you may be able to get hold of the bloke through flickr, & get some info from him
Did an Army infantry training exercise through that area forever ago now, & NOT in a hurry to go back bush-bashing through there!