Hi John,
Could be tough getting things for .38 Super in Oz?

Seemingly plenty of .38 Super load data at Load Data dot com. Not sure what pistol powder you have available.

Dies…..shipping from States is possible but maybe expensive. ebay worth a look.

Brass? Due to export restrictions any brass from USA is probably a no go….

Bullets? Any lighter .38/.357 jacketed if it will feed or CBE could make you a gas check mould.

Press? Anything like an RCBS Rockchucker up to progressive type….skys the limit.

Wish I could be of more help.
The .38 Super is a nice cartridge.

- Mike