Actually, most cosplayers make their own(i made mine when i went to Katsucon), out of styrene, sheet metal, cardboard, vinyl, foam, or a combo of those materials. If you really don't want to make one, you CAN buy them from people who make them, but they are custom orders and take a long time to make and cost from $150.00-350.00+ And if you buy one, it may not fit as well as it would if you made your own, so I recommend making your own( i used this tutorial:[link])
Thank you so much! I just think they look cool, even tho I don't think I could pull of a good Ed (too tall, got boobs, stuff like that) Maybe it wouldn't be to hard to make am automail arm. I can sew (check out my witch hunter robin costume!!!) So thanks again your very helpful.