FeliceC: Welcome to Bladeforums.
The cards could be found in the BudK catalog.
but it is better suggested that you learn how to throw generic playing cards, once you learn how, you can really go far from there, including being able to stick them into stuff. (case in point: I was messing around throwing them outside near my target (cats would pounce them in mid flight) and I made a wild throw that put it into my knife throwing target.)