Storm door insert retaining clips and screw

I have been unable to locate replacement clips to hold screen- and storm-door inserts. I am happy to use anything that will work, even if it is not precisely the same thing as seen in this image. The clip is S-shaped and fits into the frame, held by a screw (also happy to use thumb screws). The clip seems to be made from 3/4" wide metal, 1/16" thick, and the offset is 1/2 inch.