I’m on a first name basis with several employees at 2 different Home Depots in my area. I’d have a frequent flyer card, but they don’t issue them...yet. Tonight I have to go get a new track for a bifold door closet. This morning, the door fell out of the track onto me. Not good!
You might not need a new track; you might just need to replace the pin atop the door that slides along the track. I did just that last month: I used a 3/8” dowel and everything works fine.