Prairie Jen, you *are* a kind and generous soul!
Alas, my American sisters, you are lucky that Ellen Hutson doesn't charge 20$ for shipping within your country.
Pearl, you can use cereal boxes for the backings. Then use cardstock for both the front and back.
Your best bet is to invest in a one inch punch. Then you invest in a 7/8 punch. then you start saving all those bits of cardstock and designer paper...
Pearl, I did a brief writeup on how to start inchies. You may find it useful.
Camel Caravan Tales: How to start on your Inchie Journey