Single wheel roller is too wide

I would have to agree with your thoughts on our 81-019 roller assembly. I believe this roller will work for you. Please recheck your measurements and dimensions to make sure they match up to ours.

That black drive pin on the 81-019 is used by some manufacturers to hold the roller in place. It would go through a hole in the bottom rail of the patio glass door. Your roller has a rivet in the place of the drive pin, so I'm not sure how yours is held in place. You could cut or grind down the pin, which is 7/8" long, to the length you need. You could also purchase the 81-310 axle kit. It comes with an assortment of pins and rivets, including some that are shorter. The 81-019 also come with a steel wheel option.