bottom track for our Monarch Oak Mirror door

Help!!!!! I am in need of the bottom track for our Monarch Oak Mirror door that goes on our bedroom closet. The length is 71 and a half inches. Total width of the track is 3 and one quarter inches. Each door is 3ft. 1 inch. The attached pictures are of the railing and the rollers. I hope that they are what you need, if not just inform me and I will get whatever you need. Don't know if it will be of any help to you....this door was purchased in 1992, the only tag that these doors have on them is the Monarch tag which had their address at that time and no numbers. Please let me know what I need to purchase so I can make an order and put our doors back on the closet.

Thank you so much for any help that you can offer me,

Thanks for all the great help, did the measurements between the two rails, and this will work perfectly. Just placed the order. All of your staff there at Swisco have been wonderful to work with.

Deb