Replacement part for Milgard window

A quick learner from Camarillo, CA says:
Hello,
I need help identifying the plastic part depicted in the attached pictures. It is for a Milgard single hung, non tilting window. I recently purchased two Chanel balances for this window and discovered I am missing this plastic part which sits in the channel on one side of the window. Thank you for your assistance.
Thumbnail of the uploaded file named 8B5FF61D-645B-4A31-89D0-CF6CF2A5A32B.jpeg
Thumbnail of the uploaded file named 6DFF8994-EA3A-45FD-9087-24FF1BB8E3E0.jpeg
Thumbnail of the uploaded file named 6C2ABA5A-2F70-4452-8F01-A963318AB0A3.jpeg
Thumbnail of the uploaded file named C525A7CF-E048-4E6F-8558-9D2220AC8160.jpeg
Profile picture of Jasmine
Jasmine from SWISCO responded:

Thanks for posting! We do not carry an exact replacement match for your Milgard window top sash guide but I believe our 18-188 5/8" Top Sash Guide should work well as a suitable replacement. To determine if this is the right fit for your repairs carefully review and compare the dimensions below.

Alternate view of 18-188
Alternate view of 18-188

Alternate view of 18-188
Alternate view of 18-188

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How to Replace a Top Sash Guide [1080p]
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