Hi Kim. I agree with your ID. Donald Hobert has an image of the adult on ALA https://biocache.ala.org.au/occurrences/4bd760f8-a436-430e-a743-c579d4c44c5d. It also features in The Insects of Australia CSIRO 2nd ed. Vol 1 p.390 Fig. 24.14 G. We see the nymphs here in Wonboyn in October and the adults in January.