Vent window channel "Fuzzy" strip

Yep we can expect all old plastic to be extremely brittle. And if a upper guide suddenly breaks, the glass drops out destroying that thin flocked strip. With soooo many vendors carried these kits, I find it hard to believe they are not available somewhere. I haven't searched them in a few years. The 55 dollar Mopar brand 1 door kits may be gone.
Good hunting