The company that Glen St. Charles son has,(the name escapes me right now) has them. I`ve bought some from them before. They are very nice and very cheap. I had a machine shop make me a drill bit shaped the same as the ferrule. I clamped two pieces of 1/2" aluminum plate together,spaced apart with pieces of my blade material and drilled in the slot to center. Take apart,clamp the ferrule in the groove you drilled,clamp the blade around it,and silver solder it,and your basically done. Perfectly centered every time.