Top Sash Guide & Clips

A quick learner from Jersey City, NJ says:
I recently purchased two new Series 351 1/2" channel guides, but when I tried to install them I discovered that the top caps (sash guides) were broken as well.

Attached are photos of the existing broken guides. I need a right and left guide for one window. Please tell me the specific part number I need.

Thank you.
User submitted photos of a top sash guide.
Profile picture of Paul
Paul from SWISCO responded:
This looks like our 18-159P. Check it out and see if you agree.
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