Hello there!
Thank you for reaching out to us. Our 81-269 roller comes to mind. This looks similar to your old assembly. We recommend you review the specifications and compare them with yours to see how they align.
Yes; the length of the 81-299's tab is 11/16". I hope this helps.
That appears to be 5/16" on our roller.
I'm glad to hear you were able to make it work! The only sliding glass door track we sell is the 80-106 but it doesn't appear to match your original, unfortunately. Have a look at the specifications and see if you think you could adapt this regardless.
I have a few suggestions. You could consider the 80-045 and the 80-046. Review the specifications to see if you think you could install either of these top guides on your patio door. I also recommend seeing if you can adjust the rollers to raise the door up if you haven't already.
Another idea is that your wool pile weatherstripping may be worn and needs to be replaced. We would just need to know the written out base width and pile height to narrow down some options. You're also welcome to browse our selection here at your leisure.
I'm not sure the 80-106 would be a good fit but we do sell a track cover, the 80-102. This may be worth considering.