Re: Screen Door Replacement - The whole door, not the screen
I think I understand your question.
My 89 Georgie Boy has the main door and screen door hinges in line on the same loooong hinge pin. Mine was sagging (worn hinges) so I unscrewed the screen door from the hinges, elongated the holes in the hinges and screwed it back on.
If the screen door broke off the hinges, and the hinges are still intact, you should be able to screw a new screen door on the hinges.
If the hinges themselves broke off, it will be tougher. I have NOT done this repair.
It seems you should be able to take the hinge pin out and replace the hinges/screen door. Probably a tough task, if it is doable at all.
Whole door and frame replacement sounds like overkill, but the way they build these things, you never know what can be done.
Good luck!