I quote from an auction:
"WHAT A WONDERFUL GAMING CHIP SET FROM 1981 AND THE WORLD FAMOUS PLAYBOY CASINO IN ATLANTIC CITY, NEW JERSEY. THIS CHIP SET IS IN GREAT SHAPE! THESE CHIPS CAN BE FOUND IN THE OFFICIAL U.S. CASINO CHIP PRICE GUIDE 3RD EDITION. PERFECT FOR ANY COLLECTION BECAUSE OF AGE 1981 THE CONDITION PLUS ITS AN OBSOLETE HARD TO FIND.THESE CHIPS CAME FROM THE FACTORY WHERE THEY WERE STAMPED IN HERNANDO, MS. GAMING CHIP SET FROM THE WORLD FAMOUS AND LONG CLOSED PLAYBOY CASINO IN ATLANTIC CITY, NEW JERSEY. PAYPAL, MONEY ORDERS AND CASHIERS CHECKS ACCEPTED."

http://cgi.ebay.com/Rare-Playboy-Atlantic-City-Casino-Chip-Set_W0QQitemZ130214787499QQihZ003QQcategoryZ63760QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Maybe someone found some chip in the old factory, or worse maybe someone found the system to print some chip now.