I ordered one from the states because the d!@k head that makes them here in wollongong wanted 5 times more than what it was worth to buy one in from ecklers. If they are not long enough you can buy these small cable extensions to make them long enough for RHD.
I know there are a few people that make them in sydney so you should be able to get one made, just look in the phone book for someone that does speedo or instrument repairs as they usually are equiped to make them up on site.