Depends where you are - Black Milk Coffee in Brisbane are a relatively small outfit and one of my favourites.

Seven Miles Coffee Roasters do some nice stuff too. Can highly recommend their Cats Pyjamas and Belaroma blends.

I get mine from Double Roasters Marrickville. But again, like others have said, it depends on where you are in Australia

Jasper in Melbourne. Fast delivery and I've only had one issue with quality in over 3 years. Try the East Timor, it's fantastic.

JustFreshRoasted are great, they have heaps of options for single origins.

Unlike many other roasters, the beans arrive within days of being roasted and have the roast date on them - not just an expiry date looking at you Jasper, Jasper do some nice blends though to be fair.

Coffee Snobs is also great too. Depending on where you live there may be local roasters to lookup also.

I often stock up on coffee from Inglewood when they have their half price sales, it's consistent quality and both their single origin and blends are quite nice, and for anyone who can't handle caffeine, their decaf is probably the nicest decaf I've had

I like single o, the fact they provide recipes so I don't have to go through the pain of dialing in is nice. Plus their blends are pretty good

However I do tend to receive shipments like 5 days after the roasting date