Actually, door glasses ship pretty easily if you package them right. (except for the international part!) I've been shipping door glasses via UPS for over 20 years and haven't had one break yet. (knock, knock) I bend and tape some cardboard over all the edges. Then wrap the whole thing in carpet padding (or a good quality foam rubber). Then a thick one-piece cardboard box. Don't try to splice two boxes together. It just doesn't hold up good. I do back glasses the same way. The only thing I won't ship is a windshield. Those things will break just looking at them wrong.