I have a 38 break open H&R knife revolver that has a broken or missing catch to lock the knife under the barrel. I have contacted several of the well known gun parts places on the net, but none of them have any knowledge or parts for this rare pistol. The gunsmiths that I have shown the pistol to cannot repair the gun since there are no parts available. Does anyone know of such a pistol that can be had for parts? Are does anyone know of a practical way of repairing the pistol?