Retractable Screen Door 21, Navion 24V

[Sparky19053]

I searched before starting a new post. We have a retractable screen door. Unknown manufacturer. One of the cords that runs thru the screen that extend and retract as you slide the door open or closed has broken. Apparently all the cords work as one cause with one broken cord the rest are limp. The screen door doesn't operate. Has anyone had experience how to restring this or replace the screen door to a swing out style door? Any repairs will need to wait until we get home later this month.

Thanks in advance for any suggestions.