Their products are pretty much standard bushwalking/camping gear, you can probably find the equivalents (cheaper) at the bushwalking store chains, Kathmandu, Paddy Pallins, Snow Gum etc, every "city" (even Adelaide;^) (sorry, always wind up Adelaide mates about being in a big country town, like Canbugga but with less a'oles) have plenty of these. For more standard fare, caravan/camping stores will have less bushwalking-centric products, like the aluminium framed stretcher beds, they fold up to about 10cm x 70(?) CM, weigh about 1KG and DON'T get leaks, the caravan/camping gear also costs less BTW.
If you want quality outdoor gear, most of the best in the world is from our Eastern State, New Zealand, I've got gear from all over the world, the New Zealand Brands like Macpac leave everything else behind.
Up until about 7-8 years ago when I moved to Canbugga for work I used to be out in the bush nearly every weekend, (bushwalking, bicycle touring, kayaking) self inflating air-mattresses are OK, until you get a pinprick and then they're a !*$!! to find and fix the leak, I have about 5 with slow leaks that I haven't managed to fix 100%. Bushwalkers usually swear by the alchohol stoves as they're smaller and lighter, but if you're cooking for 2 the pressurised white gas (lighter fluid) stoves like the whisperlights will give you the heat to cook a lot faster. NB: On the water bladders, they work well, I started using mine for bushwalking after I got some in the early days (late '80's) for MTB, and got many people in my bushwalking club onto them, as you can have a drink without stopping to get the bottles out (which would be handy on the bike on the move, too).
Sorry to ramble on, but while I know SFA about modifying the bikes, and am only just starting to learn, I do have a fair bit of experience with this sort of camping gear.
'85 XV1000 with some mods, getting there
'86 XT600Z, going under the knife ASAP