I have an old yellow handled case trapper that belonged to a carpenter i worked partners with for a few years. He was an older guy that I really liked and when he passed his son (i went to high school with) gave me his old knife. He never used a utility knife he just used the pocket knife and sharpened it every mourning. The main blade is like a tooth pick. Can this blade be replaced without ruining the knife? If so who would do that sort of thing?