G'day datsun610. I'm in NSW too. Sick Bike Parts is the place to get a shift kit. They post to Australia.
I'd recommend the heavy duty version. I bought one a while ago. Well worth the cost.
I'm in Nowra.
My heavy-duty shift-kit cost $280AU delivered, a few months ago.
If you're interested, there are some pics of the shift-kit in the 'My Rides' album on my profile page.