Need 30 Sliding Window Rollers

A handy person from San Diego, CA says:
Hello. I am looking for a source for 30 of these rollers.

Thanks very much.

User submitted photos of a window roller.
User submitted a photo of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hey, Joe. I believe you have a Guaranteed Products Corporation window from back in the 80's. The closest I can find is our 87-196 1/2" window wheel. Please review and let me know if you could use this as a replacement. I am not certain if it will work, but there is a possibility.
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