Dave Sr. from SWISCO responded:
May 26, 2017
We do have a few different corners for overlap screens, but only one seems to come close to yours. Take a look at the 95-246 corner used on 3/8" thick screen framing. The corner flange seems to match yours at 1-1/8". However you will need to cut out the inside corner. Reason being the screen groove is not on the same side as your corner. Take a look at see if you can adapt these to your screen frame.
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