New life, Subscape, oakleigh, Keysborough, Mentone, sunnyside Aquariums.
Keysborough has just got some beautiful tiger discus in last week. Nearly bought one myself. Was $225 I think.
Mentone discus are pricey. Subscape is pricey too but good quality.

I know of an importer who has gets great stock in Melbourne too.
There's a guy on here with a 9ft who buys from him. Nice fish. He gives good deals if you buy a few in one hit.
I'll try find the guy with the 9ft.