It is available on Intelsat (Lyngsat) 18, if you can get your dish pointing low enough on the horizon to catch the signal.
http://tv.australiaplus.com/tuning
Intelsat 19 is at 166 degrees (ie to the east of Thailand). 18 is at 180 degrees, or even further east, and therefore lower on the horizon.
I am considering trying to move my dish to see if it will catch 18, but reviewing what other channels are available (
http://www.lyngsat.com/Intelsat-18.html ) it will be pretty much ABC Australia Plus, and nothing else. At least on 19 you can also get BBC, NYK (Japan) and YTN (Korea).
edit: Dave beat me with some of the info.
Dave - do you have True optic fibre, or cable?