In the same process right now.
I contacted Tiffin. Our hinges are no longer made. Phillips was the hinge manufacturer.
However, Tiffin Parts service is sending me three hinges that replaced our current hinges. They believe they will work.
Tiffin gave me dealer cost for each hinge which is $37.83, retail was $53 and change.
Doors are not cheap. I did a temp repair on the hinges, which snapped until I receive the new hinges. If the hinges they send don't work, then the only alternative may be a new door with framework. Not Cheap. $400-800, depending on where you look. Before I replace the door, think I'll try to locate a surplus/salvage source.
Contact your manufacturer. As your unit is under warranty they may send you new hinges without any cost.
Good luck. PITA for an entry door.