Went into Aussie Disposals today here in Camberwell, Melbourne. They have a sale on, with a couple of bucks off a few items. Some probably not discounted but they seem cheap anyway and this is what they had:
10 litre Jerry Can $7.95
20 litre cube $9.95
30 litre fermenter barrel $19.95
60 litre fermenter barrel $39.95
All the translucent white plastic, I assume food grade because they are intended for water. All come with lid and o-ring seals and bung in the tap hole. No taps, but they are about $1.50 at Bunnings. You'll need a grommet once you drill your airlock hole too.