Thanks for reaching out! There is a chance that we may be able to supply you with the screen corners you need. However, to confirm the right replacement, we'll need to see photos of the corner. removed from the screen.
In addition to the provided dimensions, it is important to see exactly how the latch is designed. Especially because we cannot guarantee that we can supply you with an exact replacement match.
Please don't hesitate to reach out with any questions you might have in the meantime.
Here are the photos
Thanks for providing the photos. The closest replacement match we have to your 3/8" thick screen corner is the 95-275 3/8" Square Cut Corner. Although, the height of the corner is 3/4".
We do have a Kolbe and Kolbe Screen corner that looks similar in design to your existing corner but it has a 7/16" thickness. Take a look over the dimensions of both of these corners and compare them to yours. See if either of these might be a fit for your screen.