Does anyone know if taper reamers are manufactured with tapers closely matching typical PAC-NOR, Lilja, Krieger, Douglas, etc barrel tapers? I am in the process of installing several NECG/Recknagel barrel band sights and swivel hangers and, being lazy, don't want the hassle of having to set them up in a four jaw and bore the taper on my lathe. If they exist, who sells them?