rear quarter window SEALS

Steele and others have the rubber wstrip. No one pops the vertical strip inside the leading edge. It's an odd shaped flocked plastic piece that acts as a seal and is part of the hinge system. You can find NOS pieces through CollectorsAutoSupply.com . A lot of their stuff comes from other collectors (on consignment) so they won't necessarily be sitting on their shelves. Consequently these pieces are ridiculously spendy. The part numbers are 2965 638-9 (there is a right and left).

And don't confuse "vertical qtr. window seals" listed for abodies with the rear pop-out. They're referring to the wing windows on the doors of sedans.

Here's an old one:

2965 638-9  '70 Duster Qtr Window vertical seal close-up.jpg