Allthough not an Australian supplier this contact may be of use as Singapore is a major stopover point for international travel and also for the fact that there is such limited opportunities in Australia to buy used industrial componants like these.
Kachin Electronics
10 Jalan Besar
#03-25 Sim Lim Tower
Singapore
Phone 6299 0375
Fax 6298 2996
kachinemail@yahoo.com
The building is within walking distance of the Little India District and is stacked from floor to ceiling with second hand motors leadscrews, linear bearings, power supplies, pulleys, belts, switches, sensors, actuators, valves etc. Unfortunately the owner is not prepared to offer a mail order service but if you know someone who is living or stoping over in Singapore they could drop by the shop to pick up the parts and bring or post them home.