Stanley sliding closet door rails/track model# 64564-001.
A quick learner from Albuquerque, NM says:
December 22, 2016
Looking to replace track after installing new flooring. Door opening 72'
Paul from SWISCO responded:
December 22, 2016
I'm not sure what to recommend based on that number alone. Can you show me a picture of the track itself? Can you also tell me if the wheels that interact with it are concave or convex?