Non tilt wood sash Weathershield channel balance top "capture?"

A handy person from washington dc says:
June 11, 2020

This plastic piece is screwed into the top of the sash to hold the channel balance.

Anything close or something I could modify?

Thanks

Kevin

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Tom from SWISCO responded:
June 16, 2020

This part is called a top sash guide. Yours in particular looks like a good match for our 18-008, but look over our information on its store page and let me know what you think.
5/8" Top Sash Guide
5/8" Top Sash Guide
18-008
$0.95
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