Numrich Arms in West Hurley, NY (now Gun Parts Corporation) used to sell a one piece Springfield firing pin made up using parts from a 1922. They may still have some. Also, there was a Garand speed action made for the 1903 International Match rifles, it used a square cross section striker spring and a skeletonized one piece striker to keep the weight down. I had one and put it into a sporter, the bolt lift was very hard because of the powerful spring and I removed it. Today a Garand speed action is a prime collector piece and would go for big bucks.
