Giving a boost to forum member (peh_7) Paul. I recently purchased a 4506-1 and wanted a new one piece guide rod. I was able to turn the head on the two piece I had. Searching the forum told me they weren't available any more. The forum search also turned up forum member peh_7. He said he makes them. I PM'd him and in less than a week I had shiny new stainless steel guide rod in my hands. Thanks Paul. And thanks to the Smith and Wesson Forum.