Like baglo said, you need the appliance you want to connect to the low pressure quick connector to not be regulated itself, otherwise you end up with two pressure regulators in sequence, and very poor output due to the pressure loss.
Camp Chef is one brand that offers a low pressure stove. A search a while ago showed lots of hits for a couple brands of low pressure stove in Australia, but I am sure shipping would kill you.
There is a lot more choice for BBQs though, as many of the better ones (often marine quality) have removable regulators, like the Dickinson ones.
Here is a review I did on the Dickinson Marine Spitfire 180, and my route to choosing it.