Searching for sears patio door rollers

A quick learner says:
This came from a patio door, most likely Sears about 17 yrs old. I'm looking for 2 of them.
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Bob from SWISCO responded:

Thanks for posting. I believe this is the 81-156; review the diagram below to ensure that the dimensions match up. Please note however we do not sell that top bracket piece; you'll have to reuse your old one.

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