Terry, if you're looking for just any clamp for the 4" ducts, NAPA has them. If you want the original type, I've got some I'll sell. Regarding the bezels for the behind the door and window handles, there were two different styles used. The 1951-52 Js used a yellow plastic bezel whereas the 1953-54 Js used a black rubber one. They are interchangeable but if you are looking to do an authentic restoration, then you would have to specify, if you don't care and just want some that will work, as I mentioned, either style will work. Tex Dean in OK may have those. His e-mail can be found on this page.
http://www.henryjcars.com/hjc60/TEX/texfs.htmlIf you're interested in the clamps, let me know.