Bifold Track, 4' Opening

Good morning, Looking to replace the top and bottom tracks (48 inches) for a closet with metal bifold doors. The house was built in the 70s. Please see attached pic of one of the closet doors and please confirm if product # 21-404 will work. Thank you. Jared

Both bi-fold doors in the picture get stuck due to a worn and dented track. I'd like to replace the top and bottom tracks. It's 48" wide. I'm just wondering if the tracks you sell are compatible with these doors. Also, the doors don't close flat because the 3 existing hinges are rusty and have ... (cont.)

I have no experience with this kind of door but I am handy and have been doing some research. I'm pretty sure I can figure it out with the correct parts. I have many more pictures if you need clarity , including pictures of a working door with parts intact. These doors have been a nightmare but my ... (cont.)

Plastic sliders compromised, do not hold on to Inside pins where the two doors close.

I'm looking for a bottom track for a bifold metal mirrored closet door. I recently got the guide pin 21-007. This is the track that goes into. The pin fits the door perfect but it rubs on the sides of track. Thank you.