Screen parts
I think we can help, though I have some bad news to start out. This corner is from a Bayforms brand screen, who has been out of business for some time. We will not be able to replace this exact corner.
That said, see our 95-206 and let me know if you could get this to work. It has a flange overlap, but do you think you could cut that off and adapt it to your frame? It is specifically meant for a 3/8" thick frame so that may also be an issue.
I'm afraid we have nothing else that may work for this frame. If that won't work, then it may be time for new screens.
As for the clip, our 70-211 looks like it may function under the same principle. Let me know what you think.
Thanks for writing in. Not sure you can file down the 95-206, but as I've learned in this business, nothing is impossible--it might just be a lot of work. Check you screen frame to make sure it is 5/16". It might be 3/8". Double check to be sure.