If you access to a stove, you can dip PVC conduit in boiling water to soften it and form it around the knife while it cools. Use a towel to protect your hands while forming it. Caveat Emptor: I'm not sure I would use the pot for food afterwards...

Or just get a knife that's safe for pack carry to begin with

http://www.target.com/p/farberware-3-5-i...er/-/A-50424185

http://www.target.com/p/folding-knife-gerber/-/A-14898467
_________________________
Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane