Hi Hellboy,
General Music isn't Liontracs, I think they were originally called GEM.

General Music is available thru Bava's
( Liverpool I think, NSW )
Ketron thru Gospel Piano's Villawood (NSW).

There is a synthzone Ketron & a General Music forum .

I don't like making recommendations as I'm only a hobbyist. I've never owned a General Music instrument, my current keyboards are a Ketron SD1+ and a PSR1500.
Have owned Technics, Yamaha, Roland & Korg keyboards over the years.

In Sydney you could probably get to see most of the top end arrangers, unfortunately not in the one store though.

best wishes
Rikki