'66 Dart GT window channels

Seems I've wound up removing the vent window assemblies and the rear glass track from my GT hardtop and I think I can get the channel for the front of the door glass, but whassa deal with the rear one? I removed the channel assembly and I find it to be very wide and deep. I've been unable to find anything to replace this fuzzy material. Anyone had any luck repairing these? The ones in my car are not too bad, but geez, the durned thing is out and it'd be nice to make it all nice and snug. Looks like I could scrape out the old stuff and glue in some new material if I could get the fuzzy stuff. I think it needs to be about 2.75-3.0 inches wide and about 17 inches long for each side.

Thanks for looking,

Jerry in Denver