2 piece aluminum housed patio roller

Thanks for writing in. Well, I've checked with our suppliers and unfortunately I could not come up with a two piece roller like you show in the photos. In all my years of repairing patio doors I have never come across a roller like this one. I suggest that you take a look at the wheel and axle kit 81-272. See if you can just replace the wheel and reuse your housing. Another option is to look at the 81-009 patio glass door roller to see if you could adapt this to your door.