1 in. Screencorner

I am very familiar with this screen window corner, but it is unfortunately not a product that we can supply. What you have here is a screen made by a company called Bayform, who went out of business quite a few years ago now. The issue is that no other company continued production of their hardware, so they more or less took everything with them. I don't know anyone who still sells Bayform parts, and no substitute I've tried has been successful. And trust me, I've tried.

I hate to be the bearer of bad news but I think you might need to look into getting all new screen inserts. I am very sorry for the inconvenience. 

I understand. I'm sorry I couldn't give you a better alternative.

Best of luck with the rest of this project.