Aluminum frame patio door wheels

This looks to be just the internal component of a larger roller assembly. That may be why you can't find a match; the external housing is an important part of identification. It's probably still in the door. We'll need to see the whole assembly together in order to find a good match.

I wish just any roller assembly would work in this kind of door, but that is unfortunately never the case. These are precisely sized parts and you really do need an identical match. That would make my job easier, though.

Fortunately, I recognize yours. It looks just like our 81-027. I recommend carefully going over our dimensions to confirm they line up, but I feel confident that this is the part you're looking for.