Found there's a Toyworld opened up again at Chadstone, but a clearance one. It's in the same location outside Target where there used to be a Toy Kingdom many years ago (like long enough ago that I bought Powermaster Joyride there).

No Jetfires, the only TF stuff they had were those Kreo buckets that Coles had, and some remote control TF:Prime cars that I think Big W sold.