Patio door roller assembly

I'm not sure what to recommend. I had a few questions first: what holds the roller housing into the door? Also, do you know the manufacturer? In the meantime, take a look at the 81-039 roller. I have a a hunch something like this might work for you. Look it over and see what you think.

Could you send us a photo of the door where the wheel is installed. If you were to use the 81-039, would the mounting screw go into the hole on the tab? Also, would the location of the adjustment screw match up to yours? Your roller looks old and worn and I would suggest just replacing the wheel and axle with something like our 81-272, but because you have some wear on the sides where the axle would could be a problem.