Trying to find window felt for our 1974 4 Dr Dart. Can not find a vendor that sells sets. Is there a vendor or can you "modify" felt from a 2 door set?
See here; you can get all the window felts and seals for your '67-'76 Dart or Valiant 4-door, at a club-discount price, from a reliable vendor -- that's what I did for my '73; quality and fit are terrific and they were sent very promptly. I found it a much nicer option than buying from a vendor with a problematic reputation and a tendency towards excessive markup.
Yep, the stuff available from Restoration Specialties includes the "Cat Whiskers" where the apparent bottom of the window glass meets the top of the lower door sheetmetal.