I am about to get into the doors. I will be doing just exactly what you posted. A couple years ago I fully restored a 1970 wagoneer for a friend. And I completely rebuilt the division bars and all window channels including the tailgate. I sourced the channels, brass rivets everything to completely reproduce very high quality replacements. So I know the parts are there. I have not sourced them just yet. I have some part numbers I need to find. I suspect the M715 parts are just FSJ parts. Because when they built the M715 they looked at what they already had that would make a truck and not be a complete redesign. I will try to get after that soon. As always I will post up. For now if you can't wait, then remove your parts, measure the channels, measure the glass thickness, and start searching. Some times the channels will come as a new assembly. Meaning you don't just fill the channel with felt whiskers. Then you trim to length and attach any mounting flags with rivets etc. If you find good stuff, well post it up then for others to help keep their trucks alive. That is always my intent. And I will try to get after that soon. I hate rattles and noise that can be made gone.