Track for closet for. Unit that hangs from top

This home is a "Warmington" built home finished in 2004. The track is so bent now that the door doesn't work. The total door width is 58 inches. Each door is 92 inches high and 30 inches wide. There is a small plastic piece at the bottom that supposedly keeps doors on. I've had problems since I bought the home in 2009.

I need a new track!!! Please help identify-- you'll have my business for ever.