Try these sites and e-bay
http://forcefieldmagnets.com/catalog/ (http://forcefieldmagnets.com/catalog/)
http://www.magnet4sale.com/home.php (http://www.magnet4sale.com/home.php)
http://www.kjmagnetics.com/categories.asp?PARTNER=Overture (http://www.kjmagnetics.com/categories.asp?PARTNER=Overture)
http://www.magnetcity.net/?iorb=4764 (http://www.magnetcity.net/?iorb=4764)
http://www.supermagnetman.net/index.php?cPath=37 (http://www.supermagnetman.net/index.php?cPath=37)
http://www.magnet4less.com/ (http://www.magnet4less.com/)
http://www.gaussboys.com/ (http://www.gaussboys.com/)
http://www.amazingmagnets.com/ (http://www.amazingmagnets.com/)
http://www.magnet4less.com/product_info.php?products_id=282&osCsid=5fc48c9a822f1b1170a75a015ce59b7f (http://www.magnet4less.com/product_info.php?products_id=282&osCsid=5fc48c9a822f1b1170a75a015ce59b7f)
http://www.eamagnetics.com/index.asp (http://www.eamagnetics.com/index.asp)