I have two metal storage sheds and the plastic gizmos that attach to the
top of the sliding doors and slide back and forth in the u-channel above
the door have most of their projections broken off and make the doors
almost impossible to use.

I have improvised replacements using bushings and screen-door rollers but
they work poorly.

I unsuccessfully asked at Home Depot and Lowes. I tried Google with no
useful hits; perhaps I used the wrong search words. Anyone have any
suggested sources for these little plastic devices?

TIA



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