Gents, from my recent research.

Aus available 585 barrel makers

Tobler Barrels- NSW

I called Robert and he can still do 585 stainless.
He is also checking in a few weeks whether they can also do chrome moly 585's again. I got one off him about 13years ago, but he said they sold off their biggest drill sometime since then and have not offered them. Not sure what the difference is in making each type but a stainless is a definite at any rate, and if all goes well testing his smaller drill chrome moly may also be a go. I passed this onto Bob Devries at Kudu as well as I know he had a few 585 orders to fill. Anyone interested should maybe contact Robert themselves , any gunshop should have his details.

Sprinter Barrels- South Australia

Keith used to make everything up to 620 cal as we know and some real oddball sizes besides that, but had not accepted orders for these for quite some time that I am aware. I talked to him and he appears to still have the equipment to do one, and from talking to him he did not seem averse to doing them again. So its possible some more gents interested could convince him to do a couple more.

Lothar Walther- imports

Importer as above and some independant smiths do as well.I am no expert but weren;t their some dramas with the 585 barrel by this maker being a bit too tight? Not sure what the ramifications are. Also I know Bob devries and a couple other blokes have been waiting for their 585 barrel orders to be approved for import but frankly I would not hold my breath. Its the 50cal+ thing that is the problem...