Last time I was at the Gamblers General Store -- which was a long while back, I prefer to use their neighbors across the street -- they had piles of Kems from a couple of closed Washington Cardrooms.

Their website also lists the WSOP cards (Kem) at http://www.gamblersgeneralstore.com/cards-and-card-supplies/playing-cards/kem-cards/wsop-tournament-used-kem-decks---standard-set-1402.php A little pricey, but if you want cards that are similar to the ones used in the 2007 WSOP its an option.