Roller assembly for a sliding door most likely from the 70's.

A contractor from Benton harbor, mi says:
I need roller assemblies for this door. The assembly seems to be attached to the bottom part of the frame in a way that would require me to take off the bottom aluminum frame part of the door before unscrewing the roller assembly. I'm hoping the pictures will be enough to get going in the right direction.
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Bob from SWISCO responded:

Thanks for contacting SWISCO. I'm afraid removing the entire roller assembly is the only reliable way of identifying a possible replacement. On older aluminum doors, the bottom part of the door can be removed in order to access the rollers. If you can provide us pictures of the entire assembly, as well as the height and thickness of the housing and the diameter of the wheel, this would be most helpful in identifying what you need. Thanks.

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