Sourcing / Identifying Patio Rollers

A contractor from United Kingdom says:
Please help identify and source the patio rollers below. ALLEN STEVENS 'SNAP-IN'. They do not have a screw fixing, but just snap into the holes seen in the last photo. . . .Thanks
A customer submitted photo of a roller.
Allen Stevens Corp Woodside, N.Y.
6049
6047
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. Please take a look at our 81-005 sliding door roller. I believe that yours could be an older version of this. Compare its dimensions to your hardware and let me know what you think!
A home owner from CNY says:
i have the allen stevens 6049, w 6047 on the roller: I see your 81-005, but the side farthest from the roller above the flange area is kind of cut out- Your replacement one is a taller single piece. Has anyone had a problem with a fit ?
Profile picture of Paul
Paul from SWISCO responded:
I have been using 81-005 patio door roller as a replacement for this Allen Stevens roller for years. So far I have had no problem, it fits right in.
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