Door Glass Adjustment

I have the door panel off now and am looking at the adjustments. From what I see the window is as far up as it will go, looks like the roof rail weatherstrip needs to be replaced, maybe shrank? Darn rubber, won't last 100 yrs.
The part I was referring to is inside the vertical channel at the front of the door glass/vent frame, the glass gos up and down in it, don't know the correct name.
Do you go to the swap meets in Belton? Maybe we can meet at one this summer.
Thanks for the info
Bruce