Will Case, replace any blade or blades on their knives. Might purchase an old long skinny 2 blade at a junk shop. Blades have been sharpened almost way to much, almost gone.

Most likely no.

Older knives & discontinued patterns,, no.

A buddy of mine sent his mini trapper back with 2 broken blades, and case replaced both blades w/ new blades and no charge. This was a older mini trapper

I would think so. If its very old I am sure you can get a custom knife maker to do it. are you current blades just that far gone. old knives have a lot of character but it you want it replaced it can be.