Painters threw out bracket on outside of window

A handy person from IL says:
I am looking to get a replacement bracket for one side of a window. I am not sure whether these L shaped brackets are really needed but presumably center the window as it's closing.
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Thumbnail of the uploaded file named image.jpg
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Tom from SWISCO responded:

Hello! Thanks for contacting us. This part looks very similar to our 39-547. I think this may be what you want, but check it out and see how well they compare.

Alternate image for 39-547
Alternate image for 39-547

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