Roller replacement

A quick learner from Delaware says:
I have an old Daryl patiorama 200 sliding glass door. Where can I find roller replacements?

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Paul from SWISCO responded:
Your door is from the late 1960's and the rollers are no longer available. We suggest that you consider our 81-279 with the 33-103 and 33-104 screws. See the guide below; the roller here featured is a little different, but the principle is the same.
Guide on roller modification.
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