Don't know about the Aussie wiring harness, but you can always add lights the old fashioned way with a switch, fuse, relay, wire and connectors.
The switch should take its power from an accessory line to keep it from powering up when the bike is off or you can use the Engine Oil Sending Unit to keep the lights from going on until after the engine is running for extra battery protection. The output of the switch would then enable the relay and the relay would do the heavy lifting to power the lights.
HTH