Replacement Patio Door Roller Assembly

A home owner from Camas, WA says:
Hi. This is a patio door roller assembly from a 1954 house, and it's probably original to the house. This one is broken, so I'd like to buy a pair of roller wheels to replace this one (and it's complement). Could you please advise me of a roller assembly that I could use to replace this one? The wheel itself is about 1 7/16", the length of the assembly including wheel is about 2", and the width is about 1/2". Thanks!
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Emily from SWISCO responded:

Hello!

This appears to be just the inner housing of a roller. There should be an outer housing, perhaps still installed in the door. In order to identify a good match, we will need to see the whole thing together.

Thank you!

A home owner from Camas, WA says:
Hi Emily: thank you for your quick response. Below are photos of the housing that is inside the door. I removed the screws, but the housing seems to be integrated into the door. Let me know if you have any advice or a suggested replacement part. Thanks!
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Emily from SWISCO responded:

It's still tough to tell but you can start by taking a look at the 81-258 . You'll just have to compare a complete roller assembly to our specifications and pictures to confirm this matches up to your original roller. Take a look at a previous discussion here  where a customer with the same roller had a similar concern as yours. 

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