Alcan window part(s)

Hello,

Below please see a picture of a glide(?) that fits into a window in my sister's home. The number "3620 W" appears stamped on the metal casing that holds the spring mechanism.

With your response please let me know if you might direct me to some "assembly" guidance as I have no idea (except by experimentation) of how this assembles and even works.

Also, some of the screens have seen better days and before I "rescreen " the fragile frames you might tell me if you have some made up and their cost...

You asked for measurements and a picture. You have a picture so I am providing some measurement.
The metal in the picture (with the spring inside ) measures 36 15/16. That figure is the metal only as (apparently) the plastic ends appears broken.
The frame of the glass window (not including the rails on either end) is 33 5/16 wide X 39 1/8 high.
The screen for this window is 32 13/16 W X 37 3/4 H

I will be away for the next 8 days. Please send your response when you are ready and I will try to monitor my emails and respond.
Thank you
Tony