Patio glass door roller

A handy person from San Clemente, California says:
March 5, 2021
The roller is worn and has developed a flat spot. We want to replace this part of the roller assembly, and hope you can help us. Thank you.
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Bob from SWISCO responded:
March 8, 2021

I believe this is just the inner portion of a roller assembly, with the outer housing missing. If so, see our 81-258. Look over the dimensions and see if you think this might work for you. 
A professional from CA says:
March 10, 2021
Take a look at 81-178.
Ador Hi-Lite Series 1200 Patio Door Roller Assembly
Ador Hi-Lite Series 1200 Patio Door Roller Assembly
81-258
$9.72
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