Need sliding guide for aluminum frame windows.

A home owner from Fountain Valley, CA says:
November 12, 2019
There are no names, numbers, or markings found on my existing aluminum window frames. The house was built in 1963 and these are the original windows.

This plastic sliding guide appears to be snapped into the frame and I fear it may break if I try to remove it.

The attached photo has a side view drawing with measurements as best as I can make. From a top down view, it measures 10/16" wide.
Thumbnail of the uploaded file named WindowGuides.jpg
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Paul from SWISCO responded:
November 13, 2019

Your part shows some resemblance to our 87-198 top nylon guide. Look it over and see if this can be used to repair your window.
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