I need a new window seal on my drivers back 1/4 window. car is a 67 cutlass f-85, post car two door hardtop. when I roll the window down, it jumps off track and is a pain to roll/hand hold back up. it is missing the rubber/metal cased trim guide. See image of passenger side, item I need is highlighted in red. If anyone can give me the correct name or even part number, i'd appreciate it.

 

At the top corner of the glass should be a white nylon guide block. If the window is carefully adjusted, it should then slide smoothly and not jump to the side when raised and lowered.

 

yea, I came across this. problem is there is NO chrome/rubber run attached to the window that slides through the groove in the pillar. The chrome/rubber piece is the one I need. There's no seal, just glass in the groove... well actually theres a gap because there is no chrome/rubber piece attached haha. My girl hates bees and their loving that gap