Tom,
I replaced the roller listed above on my lower patio door last year and it worked great, thanks for your help.
Now I have a problem with my upper patio door made by the same manufacture, I found this name inside the glass, Caradco Bendix. The problem with this door is the wood frame has started to rot on the bottom and fall apart. Is there a way to replace the bottom wood part of the frame?
Dan
When the weather gets warmer, remove the door and hopefully you can remove the rotted rail without issue. Take it to your nearest mill work and see if they can duplicate it with a good grade of lumber. I feel if you call a local patio door company they are going to suggest a new door, which is not ideal.