Replacement Rollers for Viking Windows around 1993

A handy person from Novato, CA says:
I need replacement rollers like the attached sample.

Can you help?

User submitted a photo of window rollers.
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Tom from SWISCO responded:
Thank you for your patience in this matter! We are currently working on a possible replacement for this roller and will post here again as soon as we have more information for you to look at.
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Tom from SWISCO responded:
Alright, we finally have something for you to see. Please check out our new 87-202 Tandem Window Roller and see how this compares to your existing hardware.
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