howdy narrow
so where abouts in australia are you because there is a good varity of aussie natives that you can bonsai there is the ficus nerafolia,hilli,casuirina the bottle brush the list goes on if you want you can go onto other bonsai forums to get better idea's of what tree's are readily available you can try
www.bonsaisouth.com.au
or ausbonsai they are 2 forums you might want to look into for aussie natives
i live in wollongong 90 klm out of sydney
cheers dean