I'm not sure about the original Kamp King knives, but the boy scouts have a knife very similar. I did see a few Kamp King knives on ebay after a cursory check there. Allthough they wanted about twice what a new knife from the boy scouts cost.
http://www.scoutstuff.org/bsa/campin...es/knives.html
Another thought would be to commission Mr. Harsey to make you one.