Cool. I'm glad I noticed this.
What size roll(s) are you buying?
Is it the McMaster-Carr Number 4855566
19503K11 Blue-Tempered Spring Steel Shim Stock Roll, .002" Thick, 3" Width X 50" Length
I'd be happy to buy a whole roll or two. plus postage to Australia. It's the sort of thing I'd end up using for other things, besides the HP button springs I need.