Storm door insert retaining clips and screw

A quick learner from Monkton, MD says:
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.
Thumbnail of the uploaded file named IMG_1104.jpg
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Bob from SWISCO responded:

Thanks for posting. Do you think our 70-140 7/16" Offset Z-Clip could work, along with a Thumb Screw like our 70-112? Take a look and let me know what you think. 

70-112 : Long Thumb Screw, 8-32 x 9/16
Long Thumb Screw, 8-32 x 9/16"
70-140 : Stainless Steel Z Clip, 7/16
Stainless Steel Z Clip, 7/16"
How to install a threaded rivnut for a wood window frame
How to install a threaded rivnut for a wood window frame
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