When I brought my 32 over from NSW to WA, I used a website called 'Auto-move'. They sent it via GSR (Great Southern Rail).
They provided the cheapest quote I could find with my research.
When it goes via GSR, you're allowed to put items in it, and it's also quicker.
I recently did some more research to find out how much it'd cost to get my car back over in NSW and I found a company called 'Auto Logistics' which also send it via the GSR for a considerably lower price than I paid with Automove.
I wonder if I can book it thruugh GSR directly.
Edit: Just researched, the train doesn't go up to QLD so can't really help you on that one.