Unfortunately these things do happen and as the sender you just have to bite the bullet, very important to check the insurance level is adequate as believe me regardless of what method you send by and how well you pack and label, things get both damaged and on many occasions simply disappear.
I have always laughed at the instructions Motordyne give for sending back the collectors and I quote '' when packaging please assume the delivery man will drop kick your item from New York to CA'' how true that can be.