That's pretty cool. Don't suppose you remember where you got them? I have books but if you have to bug out - books are very heavy and they'll have to stay behind. I might be able to bring a double duty deck of cards.
The cards are easily available. I have a set, too.
Amazon carries them.
http://www.amazon.com/Wild-Cards-Edible-Foods-Ages/dp/0880795158?tag=dogpile-20