I have sealed 500 packs of Hornady revolver balls for sale in a variety of sizes listed on The Firing Line's Black Powder Classifieds.
500 Hornady Revolver Balls - $61 shipped*
http://thefiringline.com/forums/showthread.php?p=4103305#post4103305
500 Hornady Revolver Balls - $61 shipped*
http://thefiringline.com/forums/showthread.php?p=4103305#post4103305