Wow - you're not wrong about it being hard to find.
Couldn't find it on Amazon, eBay or abebooks.com
Closest I got were these:
http://www.ebay.com.au/sch/i.html?_o...ki%22&_sacat=0
http://www.abebooks.com/servlet/Sear...borowski&sts=t
abebooks had this title:
Green Guide to Insects of Australia (2002)
Zborowski, Paul; Storey, Ross
But not sure if it is the "same" book
Anyway, I hope that it helps.
Paul