Just stopping in quickly, DS is a bit poorly so not giving me much MNing time!
Seconds I've only seen NAM in ready made cartoons in supermarkets, but I've seen aptamil cartons on the Australian Karricare website so they should be available here. If you go into a small pharmacy they should be able to order some for you and it will arrive the next day. Or try Chemist warehouse, or a larger baby store. I make up formula using hot water too, even though it says not too.
MaMa what a coincidence, I removed the insert from the ergo for the first time yesterday, and it was much more pleasant and less sweaty for me. DS's legs suddenly seem long enough to get round my waist rather than staying in the frog position. There is less support for the head without the insert, but the sleeping hood makes up for it. I'm still trying the pram (in the pushchair mode) every few days. I usually get 10-15mins before the screaming starts. The stars have to be aligned for an actual nap!