Meade USA sell the ETX80 Observer, which is an 80 mm f/5 achromat on GoTo Mount and tripod, all of which fits in the supplied backpack.
http://www.meade.com/etx80-observer.html
You'd have to get it imported on special order, as I don't think any Australian retailers stock it, or you could assemble something similar by buying a comparable compact OTA, GoTo mount, etc, and making some padding for a sturdy backpack or camera bag.