By pass closet door track

Thanks for posting. It's a bit tough to tell from this photo, but does this track have raised rails that rollers run on, rather than grooves? If so, it's a track for concave rollers, and although we don't have an exact match, our 23-270, 23-271 or 23-272 might work as a substitute. Even if the overall end profile dimensions differ, if the distance between the rails matches, I think this can work for you. Take a look and see what you think.

Profile view of bottom concave roller track