I'm surprised that nobody has replied yet, or they must not be too many west aussies on this forum.

Mount Lawley is situated just north of Perth, and in fact there is a r/c store in Mount Lawley. http://www.stanbridges.com.au/. It's one of the best in W.A. There is also http://www.perthhobbycentre.com.au/main.shtml. another good place. Theres heaps more to.

Lots of tracks around the state, catering for everyone. For tracks, check out the aussie websites list thread, started by nitro dave, noting Sil80's post.