Here's an ebay listing:

http://www.ebay.com/itm/BULL-PEN-LOUNGE-BLACK-POKER-GAMING-CHIP-STRIKE-YOUR-OUT-BLACK-HAWK-CO-/150848618641?pt=LH_DefaultDomain_0&hash=item231f474091

Description says:

HERE IS A WONDERFUL HARD TO FIND ANTIQUE ADVERTISING CHIP FROM THE WORLD FAMOUS BULL PEN LOUNGE WE ARE TOLD WERE FROM BLACK HAWK, COLORADO, BUT NOT A GUARANTEE. THIS CHIP IS USED BUT IN GREAT SHAPE. A BLACK IN COLORED CHIP WITH SMALL KEY MOLD AND HS - GOLD PRINT. THIS GREAT OLD ANTIQUE ADVERTISING CHIP READS IN CENTER ON ONE SIDE. BULL PEN LOUNGE. THE OTHER SIDE OF THIS GREAT OLD ADVERTISING CHIP IS BLANK. IF YOU NEED ANY OTHER INFORMATION ON THIS GREAT ADVERTISING CHIP JUST EMAIL ME. I WILL BE HAPPY TO ANSWER. PERFECT FOR ANY COLLECTION BECAUSE OF AGE THE CONDITION PLUS ITS A HARD TO FIND OLD ANTIQUE ADVERTISING CHIP FROM THE WORLD FAMOUS BULL PEN LOUNGE? OWN A PIECE OF THE FAMOUS PAST. BUYER TO PAY $2.00 S/H IN THE USA. INTERNATIONAL PAYS $3.00 S/H. ALL MONEY BACK INCLUDING S/H IF NOT HAPPY FOR ANY REASON! NO EXTRA S/H ON MULTIPLE ITEMS YOU PURCHASE FROM ME IN THE USA. MEMBER OF CCGTCC. THANKS.