Window Part Needed

Can anyone help me fine where I can purchase the following part. I have a 1987 328GTS. The driver side window front edge runs up and down in a slot that separates it from the small triangular fixed window. The slot has some sort of fuzzy gasket material that the window pane rides in. Due to my window rubbing on this material, it has begun shredding and needs to be replaced. What is the name of this part and where can I buy it. Thanks in advance.

 

I'll check them out, thanks. I noticed that this window rides harshly on the inside edge and that has caused the wear. The passenger window does not press so much against the channel and shows no wear. Last year I replaced the door speakers so I had the door liner off and could have easily adjusted the tilt of the window (assuming it has an adjustment). Too bad I did not notice it when I had the door apart.

 

Can the tilt of the window be adjusted from inside the door like on other vehicles? I did not take notice when I had the door liner off for speaker replacement last year.