I have replaced sides on a Case knife I found in the woods. The process was fairly easy and straight forward. I ground the pins flush with the liner, then epoxied in some antler I cut to fit the bolsters. I then used a belt sander to make it all flush again, and polished it up nice. Gave it to my dad as a christmas present. Probably need to buy a donor knife to get the bullet.
Fixing the pins and all would be expensive, I would think, and most knife guys wouldn't get excited about working on a Frost Cutlery.