Window parts

A handy person from Glendale,CA says:

I have several Masterview by Atrium windows that are missing wheels and a few more missing wheels with the plastic piece.

Do you have these replacements available?

User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hey, Fred. This looks a lot like our 87-155 Roller Assembly with a concave wheel.
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