You can try HStore in Sydney - go to their website www.hstore.com.au and have a look around.

They know a LOT about rc helicopters, and have a web-based ordering too.... so you don't need to drive all the way up here..!!

The stuff that you order from them usually arrives next day, or the day after, by express post.

If they don't have what you need (which is unlikely ) then www.helihobby.com is a good place to start if you want to get into buying parts from overseas. They sometimes have specialist upgrade parts etc. that are too expensive for a retailer in Australia to bring into the country and on-sell, so it's cheaper to buy direct.

Hope this helps!

Nathan.