Plastic roller for old sliding windows

A professional from Stamford, CT says:
I am enclosing some pictures of the plastic roller assembly of some old sliding windows. Any way you can locate these for us ?
User submitted photos of a window roller.
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Tom from SWISCO responded:
Thanks for contacting us. We have found a possible replacement for this roller and hope to have it available soon. I will let you know when we do!
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Donna from SWISCO responded:
Please see new SWISCO product code 87-135, roller assembly.
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