roller assembly on exterior sliding glass door

A home owner from Mesa, AZ says:
The bearings went bad in my roller assembly on the exterior sliding glass door and I am unable to find the part in the local Ace Hardware store. Can you help me find one.

User submitted a photo of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
Hey, Jim. Take a look at our 81-164, this appears to be a good match for your dimensions.
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