I bought a cheap set of hollow punches from Harbor freight.....7-12 dollars I think....
I punch all my over shot and over powder cards with them....cereal, cracker and beer boxes all make good OS cards.
Thick vegetable tanned leather, 3 ring binder covers, industrial belting, even cardboard makes good OP wads....
Dismantled sisal rope also works well as does tow and other plant fibers......even tree inner bark.
Some guys have even used green leaves.....