Brass Googles has been fairly quiet about events in the Antipodes in the last few years. In Melbourne, there are a few Victoriana/Goth events that occur each year, like the picnics (
https://www.facebook.com/melb.gothic.victorian.picnic). Perhaps they might have better luck following up those angles in Sydney. Please tell us what you find.
In Melbourne, I find that any excuse to dress steampunk is a good time to do so. I am presently planning a SP Han Solo, SP Green Arrow, and SP some-other-superhero-but-I-haven't-decided-who-yet for later this year. Nothing steampunk about the event, but by golly by gosh, I will help make it steampunk.
Sorontar