The guy who just reupholstered my replica made a door for mine, fits perfectly and looks like it was made at the same time the car was completed.
You can usually get small "piano hinges" at specialty hardware stores...that way you have a single hinge going all the way across the bottom and things will work much better that way.
Where can a guy get a locking "handle" for the glove box door?
Cheers!
Dugly