Replacement pin/knob to secure screen

A quick learner from St. Louis, MO says:
The little knob has a spring init and has a flange that flips around and secures screen in place. The known flew off and spring and flange got lost. I'm looking for a replacement.
Thumbnail of the uploaded file named IMG_4983.jpeg
Thumbnail of the uploaded file named IMG_4982.jpeg
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please start by taking a look at the 70-050 or 70-050B spring clips. Review the overall style and dimensions to see how they compare to your original for the best fit. Let us know what you think and if you have any additional questions. 

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