I'm Cassandra (or Cass) and am from Australia too! I might have squee'd when I saw your AIM because there seems to be not enough of us on the internet.
I have Lucius Malfoy, who's slightly different from canon. Mostly instead of being in love with Narcissa he's just good friends with her. Instead he's in love with her sister Bellatrix.
You can find me on AIM at misscassshadow or email at misscassandraward@gmail.com