patio glass door bottom single wheel roller

A handy person from Adelphi, Md. 20783 says:
patio glass door bottom single wheel roller

please help me identify this part so that i can order 2 of these.

H: 1 cm L: 6 cm W: 1.25(at its thinnest) 1.75 (at its widest)
User submitted photos of patio door hardware.
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Paul from SWISCO responded:
I believe there's still a portion of your roller assembly left in the door. I can't be sure, but I think you might have something like our 81-002 or 81-003. Look them over and see what you think.
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