Replacement roller info

A quick learner from Orlando FL says:
I can't find any numbers on the parts. The rollers appear to be nylon. The bearings are rusted out and gone. These doors are old- maybe 1982?
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Tom from SWISCO responded:

These are indeed old fashioned rollers. The good news is that we can still help. I believe you can use our 81-133 as a replacement, even if the design is a little different. Look it over and let me know what you think.

Alternate image for 81-133
Alternate image for 81-133
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