Sliding glass door rollers 1970's

A home owner from Cambridge, MA says:
Looking for glass door rollers for 1970's aluminum glass doors. I have attached pictures with the cap from a soda bottle for scale.
User submitted photos of patio door hardware.
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Tom from SWISCO responded:
I don't believe we have an exact match for this roller, but it's similar to our 81-129 or 81-262. Could you use either of these to work in your door?
A quick learner from KS says:
Tom, I'm looking for the same roller. Were you able to locate it?
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Tom from SWISCO responded:

I'm afraid the two rollers mentioned above remain our best--and only--options, but I cannot guarantee that either will work. I apologize for the inconvenience. 

A handy person says:
How do you tell the difference between 81-29 and 81-26?
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Tom from SWISCO responded:

The biggest difference between these two parts, aside from minor stylistic differences, is a matter of size. We list detailed dimensions for each product on their respective store pages that you can use as a reference.

Alternate image for 81-129
Alternate image for 81-129

Alternate image for 81-262
Alternate image for 81-262

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