This company called Mahou Birthday Cake (Magic Birthday Cake) will make a three-dimensional edible model of whatever you wish! The price ranges from 16,800 yen to 29,800 yen ($210-$372) depending on the size. Here are some of their really awesome order-made cakes:
Pretty realistic looking no? I thought the detail on the Contax camera looked amazing. You can check out their blog that has a ton more pictures.