This does not fix your door but rather prevents the wind from doing damage again. It works for us.
Taken From The Phoenix Cruiser Forum
HERE.
4) Entry Door Limiter
This limits the swing of the entry door. On a strong windy day, the door can easily get ripped out of your hand, swing 180 degrees around, and crash into the side of the RV. When my awning poles are attached to the side of the RV, this prevents the door from hitting an awning pole. The limiter is engaged and disengaged in seconds with the door open or closed, is not visible when not needed, and is self storing. It also never gets in the way when entering or exiting the RV. The rope does stretch a little, so it offers a very nice "soft stop" feel. Flange weld nuts are perfect to hook the rope on.
Cost Of Project $5
Flanged Weld Nuts work great for hooking the rope on and off from.