EBay has the largest selection of vintage Camillus knives available. Most knife-collecting websites link to eBay listings for Camillus knives. The original manufacturer is no longer in business.
EBay is a great resource for collectibles, including Camillus knives. According to CamillusKnives.com, the older Camillus knives made before 2007 were manufactured by the original Camillus Knife Company. As of 2015, knives are made by Acme United Corporation. The current manufacturer bought the name only and does not have any parts or information on the older knives. The older knives are available through collectors and on eBay. Collectors might be able to find Camillus knives from dealers at local knife collector's shows.