Hello and welcome Kev,
Sadly, there are no Perth companies who currently feel that a CS sponsorship would be a worthwhile investment. As a result, they dont get free plugs either ::)
Some of the coffee companies sell machinery as do a few stores but prices are always high as there is little or no competition.
Pretty much all CS sponsors will ship anywhere in Australia and you will find that you will most likely do better to purchase from the eastern states. Most CS sponsors also have reciprocal service arrangements in Perth- so that the drive across the Nullabor occurs only once ;)
I suggest you call a sponsor or two. You will find they are passionate about coffee and happy to help you choose the right machine.