Window screen replacement corners

A quick learner says:
The corner inserts have the number 539 stamped in them.
The thickness is 5/16 of an inch.
The length of the section that goes into the frame is 7/8 of an inch.
The actual sxuare corner is 1 1/8 inches square. The screens are from a Del Mal casement window.
Also, I need two new screens/frames for my casement windows, Do you sell them or can you suggest where I can purchase them. Will my Ace Hardware store be able to help?
User submitted photos of a screen corner.
Profile picture of Donna
Donna from SWISCO responded:
Please see and compare your corner to SWISCO product code 95-246, 3/8" Extruded Casement Screen Corner with Flange.
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