I believe the part that you're lookin' for is called the
window channel .... at least that's what I've always called 'em. I've replaced many on 108s, 116s and 123s. I've not yet been able to find an aftermarket source ... dealer still has 'em for 123s ... they come from Germany for about 45 bucks each ... left and right are the same if you can find a wreck, try the passenger side first
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78 300d 158k driver
80 300d 200k fixer
80 300d parts car
98 Cherokee 240k
" I know for certain that someday while parking or un-parking my
Jeep Cherokee, I'm gonna'
either pull the headlight switch right outa' its dashboard
OR stomp its hood release lever clean offa' the kick panel. It's just a matter of which will happen first."