Telescope.com is the Orion site, you might have found sirius optics who are in Underwood (i just checked from their site) as one of Orions distributors in Aus. Anyway if you want Sirus Optics site it is:
http://www.sirius-optics.com.au/ That's the only one I know based in QLD, there might be more if some of the banana benders around can chime in.