Sliding Glass Door Roller

A home owner from Boston Massachusetts says:
I need 4 replacement door roller assemblies for an Acorn sliding glass door. I have not found any parts numbers. The building was build in 1983, The glass panels are 4 feet wide. The assembly appears to be in good condition but some of the wheels are out of shape. I am the home owner. I am working with a contractor.

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Tom from SWISCO responded:
I would be happy to help you find a replacement roller, Marilyn. Please take a few pictures of one of the assemblies (removed from the door) and we can work from there. Please also tell me its dimensions.
A home owner from Boston says:
I will forward the photo when I get it from my contractor. The measurements are: 1.5" deep; 1.5" screw set; .75" wide; assembly 4".
User submitted photos of patio door rollers.
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Tom from SWISCO responded:
Thanks! Please look at our 81-030 and let me know if this can work for you. Carefully compare our dimensions to yours to confirm that they're the same.
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