Insure it. Then it's fine. Costs next to nothing..
Canon Aus will help with a lens if it is broken... Just complain to them on twitter.
Camera Exchange is a rip off. Go on Gumtree if you want to buy something then you can look at it.. I bought both of my Tilt shift lenses off gumtree for a steal.
Did you mean insure it with a company like RACV/AAMI? The home insurance companies?
Lol do Canon Australia really help? I know you said they helped you. Did you have to use your warranty? The paint chipped off my L lens when I was photographing at a major event (my camera was less than 2 and a half-3 weeks old when it happened

) and the zoom ring isn't as smooth as the focussing.
Lol, did you have a bad experience with camera exchange? I never thought you could buy lenses from Gumtree, thanks for the tip I'll check it out. I found photovideo.com.au when I was on amazon looking/researching for tripods (they're a sponsored link), they have a large range but the prices are a bit stiff.