DNS (Ind. Miami) patio door part

A handy person from Delaware says:
I need to find the replacement of two wheels (see photo) for a DNS (Ind. Miami) patio door (the door is 70" 3/4 width and 80" height).

Thank you very much!

John
Thumbnail of the uploaded file named IMG_9581.jpg
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Bob from SWISCO responded:

Hi John. This looks close to our 81-005 sliding door roller. Take a look and see how the dimensions compare to yours.

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