My first trainset was a Hornby clockwork train. There were no lights, signals, precision motors, point motors and transistor controllers in those days. If anyone had dared suggest that one day we would have anything as flash as DCC to operate our trains they would have been diagnosed as delusional and locked up.
But now we do have all those things for our model trains and you will find the Australian manufacturers listed here.
Gwydir Valley Models
Electrics and electronics
State of the art controllers
Ready to run sound
Radio Train Electronics
Railcon Model Railway Control
An innovation in model railway DCC control