![image](images/pictures/2023/02/622991.jpg)
![image](images/pictures/2023/02/622992.jpg)
![image](images/pictures/2023/02/622993.jpg)
Thanks for reaching out.
To recommend the most accurate replacement, we'll need know the width and thickness of the frame.
It would also really help to see a photo of the corner removed from the window. Although, I understand it may be difficult to remove them.
We have had this question before. These are Summit window Screens. I don't believe these corners are still available but I've found that the 95-207 could possibly work in the screen frame. You would need to thicken up the "leg" of the corner with tape (or something else) to account for the space.
I also regret to say that we do not have any replacements for the locking pins, however, you may be able to install the 70-009 pull pins.
If these parts do not work as replacement, I'm afraid the only other option would be to make new screens.