Looking for top rail for dual mirrored sliding closet door

Do you carry the top rail identified in the .jpg attached? The railing is from a mirrored closet door with the overall dimensions as follows: Front face 2 7/8" high (section that faces into room); 1" 'C' opening for slider rollers; 2" width between slider rollers.

I do not have any names or markings identifying this rail. However, the bypass top roller assembly found on this rail is marked 20121.

I am looking for a section 4 feet in length.

Thank you.