I use self wealth $9.50 per trade it offers stop losses now without having to subscribe to the premium package (I don't think that was the case previously). You do have to put in a separate sell order for the stop loss.
I also recently joined Stake - $3 brokerage but I misread the information there is no stop loss available for Australian stocks only US stocks.
Nabtrade offers stop loss via their IRESS ViewPoint platform (I think this is free if you meet the criteria), brokerage starts at $14.95
