Thank you for your continued patience in this matter. I'm afraid that we just couldn't find an exact match for this corner. That said, you may want to look at our 95-087
. Do you think this could work as a replacement? If the spline is on the wrong side, you may want to see our 95-031
and use a screw in place of that leg.
I also recommend that you double check the depth of the frame. Make sure that you're measuring the outside of the frame, not the inside channel.