First of all well done everyone involved.
If tests are successful, suitable pouches could then be sold at airport terminals, and the evacuation rules slightly relaxed to allow passengers to exit with just this small item.
I'm curious as to why you think a special pouch would be necessary. I have a small 10 x 15cms(approx.) very slim bag/pouch which I hang around my neck. It's just big enough to hold my passport and credit card and small enough to drop inside my blouse/Tshirt/jumper so that it wouldn't become snagged in an emergency. I bought it in ESheds market in Fremantle but similar things are available in plenty of other locations.