Tom------
Thanks for your quick reply, and coming up with what looks like exactly what I need.
Just a couple of thoughts before I order a couple of them-------------
The one that you found----84-078---is described as an Andersen, Upper roller, when, in fact, it's one of two Lower rollers on an Eagle brand unit....I guess Eagle could be a division of Andersen, but, it's still a Lower, not an upper.
I can't speak for Eagle brand doors, as I am unfamiliar with them, but I know one common issue with Andersen screen doors (especially those that use this roller) is that many handy people actually install them upside-down! You may want to check to make sure that isn't the case with your screen door.