Sliding glass door roller

A home owner from Oakley CA says:

I need help identifying this sliding glass door roller. Our sliding glass door is aluminum and installed 1989 but don't know brand or manufacturer. We're having difficulty closing and opening the door. The tail on the other end baffles me and would welcome complementary parts too so I can make 1 order.

Thanks in advance.
User submitted photo of their door hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hello, Tisha. Depending on the diameter of your wheel, I believe you could use either our 81-039 or our 81-256 as a replacement. Check them out and let me know what you think!
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