Need replacement part for H-R55-44x71

A home owner from Texas says:
September 2, 2020
Hello - I've attached a few photos to show the broken part on my window. Trying to identify what this is called and where I can get my hands on a replacement piece.

I do have an in-tact sticker w/the serial number and whatnot, but honestly am not sure any of this information actually identifies the manufacturer of the window and can't locate any other manufacturer names stamped anywhere on the window to contact them directly.

Any help is appreciated!
Thumbnail of the uploaded file named Window Pic 1.png
Thumbnail of the uploaded file named Window Pic 2.png
Thumbnail of the uploaded file named Window Pic 3.png
Thumbnail of the uploaded file named Window Pic 4.png
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Tom from SWISCO responded:
September 8, 2020

This part is called a top sash guide. Yours in particular appears to be a match for our 18-174. I believe this will work for you, though it is unfortunately not available in white anymore.
5/8" Top Sash Guide, Alenco
5/8" Top Sash Guide, Alenco
18-174
$1.96
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