In NSW you will probably have a Lucas starter fitted. If you are happy that all connections are good then it will probably be the solenoid which is faulty. Before removing the starter, turn the engine slightly by hand and try the starter again. This should release the pinion if its stuck in engagement. If it is a Lucas starter the solenoid can be replaced as a complete unit or the black cap can be replaced on its own. To replace the cap only you will require a soldering iron as it is necessary to solder a wire from the solenoid windings which protrudes through the face of the cap. It is advisable to replace the complete unit but the cap is a cheaper option.
With the starter removed connect jumper leads to the solenoid battery terminal and to the starter body. Either bridge to the small solenoid terminal with a screwdriver or similar or a seperate wire. The 'click' should still be there if it is the solenoid.
Let us know how you get on.
DavidP, Old South Wales, UK