sliding glass door roller assembly

A quick learner from lake elsinore, CA says:
left side of door roller assembly came loose - repair guy said he would have to find a new one and replace it - here is a picture of it - as he removed it. Markings on it are Kilian Toronto Can, Syracuse NY. All Metal. I took measurements but not sure how accurate they are - could only get two decent pictures of it. (no picture of it installed)
2 inch length, wheel ht 1 1/2 inches, width slightly under 1/4 inch
User submitted photos of a patio door roller.
Profile picture of Tom
Tom from SWISCO responded:
Looks like just the inside portion of a roller unit. There should be an outer housing still in the door. Can you check for me? If so, I'll need to see the whole unit together.

In the meantime, take a look at our 81-258 and see if this matches up.
A professional from California says:
This is the old style 81-258.
The corner bracket/housing will not look quite like this, but they are interchangeable. Both parts will need to be replaced.
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