I have a bolt action with a 6x1mm threading on the bolt knob. I have been looking for a larger bolt knob but I cannot seem to find one with that threading anywhere. I finally just figured I would get a gunsmith to thread one for me but I now I can’t even seem to find a blank one. Most of them are all 5/16. Anyone know where to either find a 6x1mm bolt knob or even a blank bolt knob that can be tapped for proper threading? Thanks