I haven't really taken a super good look but does the seal go all the way around the glass like the 65s do?The "good news" is that they are all the same Dodge and Plymouth 66-70.
The "bad news" is that I've only ever seen one for sale and that was on ebay about 5 years ago.
Yeah I don’t have anything just yet but was planning to remove the glass for paint.You might try Steele Rubber Products Universal catalogue. If you have a piece of the seal you might find a similar cross-section. Years ago, Steele custom made a rear glass seal for my 65 Chevy II sedan. I sent them a piece of the old seal and they made it up.