We have a 1950's home complete with retractable aluminum window awnings on the west-facing side. The cords that are in them are rotting and breaking. Does anyone know how to replace these cords? We cannot figure out how the cords are attached. The brand name appears to be "Flexalum".

The cords are used to roll/unroll the (spring-loaded?) awnings up/down, and then are tied off to a hook to keep them open.

Any help would be greatly appreciated!

Thank you,