It's generally not sold here, it has been in the past it doesn't do well. It's mostly an export beer that's brewed under license by foreign breweries so it doesn't come from here either. The Foster brothers were American. It's mostly branded as being Australian but arguably isn't.

Beers here vary by state, most of those beers are owned by multinational corporations ie inbev and Lion Nathan (kirin) these days.

While someone in Western Australia might drink Swan or Emu whereas someone in Victoria would drink Carlton or VB. Every state had/has there own big home brewery/beer.