Replacement roller assembly

A home owner from AZ says:

I need some help identifying this part. No markings on the assembly unfortunately. The assembly is 3 1/16 long, 1 3/16 tall and 3/4 wide (all approx), with 1 1/4in wheels. Any ideas?

User submitted photos of a patio door roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
It's hard to tell what this is without seeing an undamaged version, but I would start but checking out our 81-030. This appears similar, but compare it to your own hardware and see if you agree.
A home owner from AZ says:
That's the one I originally thought was the closest, but I still don't see one that matches exactly (maybe there isn't one?). I don't see one that has the little notches or cut-outs on the top, but the measurements of the 81-030 are only 1/16 off so I must be off in my measurements because I don't see anything else that similar. The only other difference besides the cut-outs, is that the 81-030 has a straight piece where the rollers go, where as mine is concave like the 81-154. That is 13/16 wide though. I was able to find out from a neighbor's door markings that the door itself is a Milgard and these were the original rollers. Maybe that will help! Thanks,
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