I can't speak for Australia, but in Germany I found all materials in my local stores. Except for the waterslide decals on which I printed the logos. Those decals are from eBay. It's not cheap. You need the following materials (in brackets the total costs and the costs per bag):
- the lowest layer is a self-adhesive matte silver film
(Euro 12.99 total, sufficient for 3 bags,
Euro 4.33 per bag)
- the second layer is a very(!) thin but strong transparent and iridescent/opalescent film
(Euro 3.10 total, sufficient for 4 bags,
Euro 0.78 per bag)
- the third layer is a printed and trimmed waterslide decal for the logo
(Euro 13.27 for 5 decal sheets in US-Letter size, sufficient for 5 bags,
Euro 2.65 per bag)
- the top layer is a thin self-adhesive transparent film, that kind of films you use to cover school books
(Euro 1.00 total, sufficient for 1 bag,
Euro 1.00 per bag)
That's Euro 30.36 (about $40) total and Euro 8.76 (about $11.50) per bag. I messed up a lot of materials when I made my first tests, so better buy more materials than you actually need.
That's what I paid. Maybe you are able to find all materials much cheaper.
Additionally you need a laser printer, a laminator and one sheet of self-adhesive laminating film (that's for that black strip inside - of course you can take a simple black cardboard as well)
A run? Hooh, I don't know. I don't want to ruin Daniel's sales. And those bags need a lot of time. A few hours for each bag. So it wouldn't be cheap - not under $50 plus shipping and it's still not 100 % screen accurate.