I think this might be Aporocera rufescens Kat, see https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:6dfbc49d-d6b1-4ff8-8a48-86ba387730dd#gallery. If not, they're very alike :) Cheers Bron
Bron, it certainly does match the images of A. rufescens on ALA, and could well be that species. I've noticed that in the ANIC the species stratioticus stands (as stratiotica) under Aporocera. I will delve into it further.
Kat, Comparing your (excellent) images to specimens in ANIC, I found that both A. rufescens and A. stratiotica have very dense punctures on the pronotum, so that it has a granular appearance. This one actually matches A. sculptilis, which has those punctures fine and sparse so that the pronotum appears shiny. All three occur in our region.