Part assistance for Top Sash Guide

A quick learner from USA says:
Thank you so much for your help! Got our order today and they definitely work. Only issue is I discovered one of our window sash guides is broken! Wondering if you could help me match it to a replacement part?

Below are pictures and approximate measurements.

Width of top: 15/16"
Depth of top: 13/16"
Length total: 1 5/8"
Top to screw hole center: 7/8"
Width of smaller 'body': 11/16" or maybe 5/8"

Any help would be fantastic as this is quite literally the last piece to have our home ready to sell. Thanks!
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Bob from SWISCO responded:

Thanks for writing in. I am afraid we don't have an exact match for this top sash guide. Our closest match I believe is our 18-142. It has a very similar design, but the hole placement differs. Review the dimensions below and see if you think you could adapt this to your window. Let me know what you think.

Side view of 18-142
Side view of 18-142
Detail of 18-142
Detail of 18-142

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