We bought our swags from a local camping store - they are made in WA but I do believe the company is now got outlets throughout Oz.
Aussie outback supplies. Very happy with ours - we have the 'tent' version - was abt $250 approx off top of my blonde wig a couple yrs ago - durable,hard wearing - we put a small thin mattress in on top of the existing 1 - bit of extra creature comfort! Tiny's last post though is right on the ball - have done a huge amount of camping/using it for sleeping out at car shows etc over the years and cant kill them - this is my 2nd 1 - 1st 1 was aquired (borrowed but never returned to me!) see links below for their website links.
http://www.aussieoutbacksupplies.com/
http://www.aosswags.com/