Shaun, Excellent news about the tyres, looking forwad to being able to get stuff locally.
Timmey, ultrahobbies.com.au are the only ones stocking them in Australia at the moment (I think anyway). Otherwise you could go to the source and buy direct from
http://www.armodelling.com/ - Probably cheaper from ultra though.
It would be awesome to see a racing class for these (not so) little puppies.