Around here, usetawas, you could find an original knife (or a knife made in the same manner as late as the 1930s), every couple weeks while out garage-sailing. Now, not so much. The past ten years I've averaged about 1-2 such knives every summer. If I only wanted one, and would settle for whatever half-worn-out knife I found, that might be OK.
But some years I'll go through 10-12 knives. Instead of trying to locate something close to an original, it is more efficient in time and money to take a knife that is of the right general thickness, re-shaping the outline of the blade and handle, drilling for the correct pins, tapering the tang, and fitting a new, correct, handle. (Other times I fit bone scales and go a bit bonkers carving them. Not cost effective, but it makes the knife easy to identify if misplaced!)