Q. Where can I find the Australian case Ace Insurance Ltd v Moose Enterprise Pty Ltd [2009] NSWSC 724?

You can try searching for Australian cases using either LexisNexis Australia (subscribed database) or AustLII (free database).

LexisNexis Australia

Launch LexisNexis Australia
Select “Cases”.
Enter citation or case name and search.
To find New South Wales Supreme Court cases, select “Cases” again.
Select “New South Wales” under “Jurisdiction” and a list of courts will appear under “Court”. Click “NSW Supreme Court”. 
Enter the relevant search terms and search.

AustLII.

Launch http://www.austlii.edu.au/ 
Enter the relevant citation or case name into the search bar and search.