A fellow RevCon renovator asked about the parts and sources I used to re-seal the sliding coach and driver/passenger windows in Flatnose Frank
so I thought I'd provide them here. Mine is a 1972, but I assume all Flatnoses to 1977 are the same (but...assumptions).
As far as a DIY, this part of the project was a pretty time-consuming challenge, but very rewarding. Be careful, I broke one of my windows in the process and could not get an exact replacement for the glass. I remain an amateur glazier.
Fuzzy channel (all around windows, what they slide in) - Note that this channel is a tiny bit too big. It works, but some windows are tight. (I assume they will loosen up with time)
Pile weather stripping (vertical seal for center sections) - Vintage Trailer Supply
Glazing channel (seals glass) - Crlaurence.com / usalum.com PN. GC722C
These are NOT OEM parts (those don't exist. AFAIK), but based on my research and experience with 8 windows, they work.
Some pictures of the process are in the middle of this page
of pictures in my renovation album.