Reserve Cop, one of the makers of the Belt Buckle Knife is the Bowen Co. I don't have their address, but they advertise in the gun mags and the knife mags. I think I've seen someone else who mfgs one, but can't recall the name.
I don't know about your state, but they are outlawed in Kalif. (Of course, most everything is now outlawed in Kalif.)