Anyone know where I can order a solid pin instead of the roll pin they use in the newer models of the MK III? I also, want to order a Volquartsen trigger target sear, and Exact edge extractor. Was hoping I could order all parts from the same place but, I'm not sure about the stop pin. If I knew the exact diameter and length, I might find a pin locally but expect it would have to be made out of high quality steel. Any advice is welcome. Thanks!