I have found an American web site that offers a 3D printing service. It is called shapeways .com. Has any one used this site? They produce a lot of railway items which you can order or you can design your own items which they will produce. They have a vast range of items including replacement parts for real cars. What would the legal situation be if you broke your shunting engine and asked these people to make you a replacement body or such like? Would something like a building or railway wagon that you had purchased be covered by copy right, making it illegal for this site to reproduce?