Guide for Sash on Marvin Window

A contractor from San Luis Obispo, CA says:
This is a top guide that holds the sash into the jamb on a Marvin Replacement Sash Kit conversion for a old double hung window. The pivot bars and shoes are fine in the vinyl jambs, but this guide holds the sash into the jamb, thus keeping it from falling out. The windows are approximately 25 years old. Single glazed, and definately first generation Sash Kits. Thanks.
User submitted a photo of a top sash guide.
Profile picture of Tom
Tom from SWISCO responded:
Could you use something like our 26-077? Check it out and see what you think.
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