I have a full-view storm door, manufacturer unknown, with a three-piece glazing bead that holds the window or screen in place. Every fall and spring it has to be removed to swap the window for the screen or vice-versa. Unfortunately, it has become increasingly brittle over the years, as PVC tends to do, and, despite the utmost of care, and the years of practice I've had, it's getting impossible to remove it without doing some damage each time. It's reached the point where it needs to be replaced, but I have been unable to find a replacement. The door has no identifying sticker, nameplate or imprint, and since it's full-view, there's really nothing distinctive about the door itself. It's just a frame. I don't know where it was purchased. It was almost new when I bought this house, but that was 18 years ago, and the building supply stores that were in business back then have all been replaced by you-know-who. It has a Papaiz lockset, but I don't know if it came with it or if it was bought separately, and it probably wouldn't help much if I did. The only thing really unique about it is this glazing bead. It's unlike anything I have seen, and I've gone through every catalog I've been able to find and looked at thousands of pictures. I'm hoping that someone here might recognize it if I post a picture showing what it looks like in cross-section. The actual dimensions are approximately 3/4" by 3/8".

I have a sliding glass door(7' high x approx.44" wide) in a 7' x 8 1/2' metal frame, sitting on a metal track. When I attempt to close it, the door sticks about 5-8" from the door jamb. I've sprayed most of the bottom track with WD-40, which works for a few times, but eventually, the sticking recurs. Is this fixable and if so, how?