I suspect that a company (chinese) could setup the print runs and cutting press such that Klaus could layout his tokens so they fit a standard punch-out pattern.
Die-cut is die-cut, the chinese arent the only ones that can do that. I would hope credit cards and bank cards for here aren't made in china!
Just think of printable business cards, mailing labels, and all those other "punch out" things you can use in your home. Anywhere that can make punchout should be able to increase the guillotine depth in order to go through the credit card type of stock.
Heck then random boosters of tokens would be interesting!...as long as they were done with common sense in mind...not trying to shove 10 "cards" of tokens per booster for like $12 of something or they are SOL. If they could find something to sell at the price point of $1, then they would have a gold mine, because most people would waste a dollar on just about anything...just look at those sticker and tatto vending machines.
1 card per pack would mean no rarity, 3 cards per pack would need to be $2, but give you two commons and either an uncommon or rare card to punch out, and people wouldnt mind so much about the cost. Scale the tokens to the right size and sell size based booster packs. Buy a pack of huge, and you get all huge monsters, large and get all large monsters...etc.
That might work if done without trying to go the price point of all other booster related products, and without thinking of them as collectible.
With as many people still sending those credit cards as coupons and such for stores in the mail, the process cant be that expensive to cut them and print them these days.