I am in the process of reinstalling my door windows, and the felt in the channel that is at the rear of the glass is REALLY falling apart, wanting to come apart as you send the window down. Can anyone tell me where I can find either the felt insert, or complete channel and felts that will fit the hardtop doors?

They dont make the channel. I've searched just about everywhere it's possible to look for those. They do sell the felt in rolls. You'll have to clean the channel and put it on w/ some spray adhesive or something similar.