You could try the Legal Information Access Centre:
http://liac.sl.nsw.gov.au
which may have some info for you.
But u should definitely try Australian Legal Information Institute (AustLII:
http://austlii.edu.au/
It has some good info on past cases. (but youve probably already looked there)
Um- you could just find cases in your text book and then do some research on them???? Or look out for recent cases in the newspaper or something???
I hope u do well- sorry its taken ages for someone to reply and sorry im dead useless