Whoops - my bad. I should have read more carefully.
There's a risk involved in creating a premium as part of a charity giveaway - "Donate $X and will give you this fine widget." The cash for the widgets has to be put up front, then you have to hope the project returns enough for the charity to get the widgets paid for AND get a reasonable amount of cash back to the charity. There's a lot of work and cost outlays involved in making a deck of playing cards.
You could keep it simple by having decks made through the Bicycle Personalized Playing Cards program. The only customization is the deck back and they cost $20 a pop, but you can order as little as you want.
Frankly, unless you were willing to eat the production costs of the decks, making something like playing cards for a fundraiser may not me the best way to go to get the majority of the money to the charity. From what I can tell, that's what's being done on the "Charity: Water" deck, and that's what was done on other relief decks like "Hope for Japan" and "Hope for Haiti". Otherwise, the decks become prohibitively expensive, requiring you to request a larger donation to receive them, which in turn makes the donors ask if they're willing to put out that much cash, even if they are getting a snazzy deck of cards in return.