Concave sliding mirror doors roller track

Hello,

This is a concave bottom roller track for two large sliding mirror doors. The length is @ 94 inches. The issue I am having is due to age and wear, the track is warped/worn to the point that the rollers jump the track at times. I also thought it odd that one door rolls on the outer lip of the track l, while the other door rolls on an interior ridge of the track, but a swisco rep on the phone said that was normal and an indication of an old track style.

I'd like help selecting a replacement track and suggestions on how to secure the track to the floor. This original track is screwed to a a strip of wood that is glued to the concrete of the bedroom closet. I already bought concave rollers that fit the door, but a suggested roller would be helpful as well. Thank you!

Hi, what is the suggested method for securing the track to the floor? These would be secured to a concrete bottom. Thank you.