Hi Jo,
Not sure if this is of any help to you, but, Fraser Island is run by the Department of National Parks, Sport and Racing within the Queensland Government. I will put their phone number up for you and you could try the National Parks section and see how you go.
National parks, marine parks and forests: 13 QGOV (13 74 68)
Not exactly sure if it's of any use or help but this is where I would try first, if you don't have any success then next I would try the Queensland State Library as my next port of call. The other place you may try is the Police Museum, they may know of something too.
Kind regards,
Kel