Wow dude how did you lose that? I'd check the for sale section lots off people get lots of front end write offs, and with such a minor part it I'm sure tons of them are being chucked away when ppl smash their indicators, plus you could post that anywhere in australia for a few buck for even for next day delivery
EDIT: Do you really need the housing? Yea it will fit nicer but I'm sure you could do a cheap fix from parts and jaycar and some soldering