I don't believe there's a such thing as a shadow or silhouette artist; most visual artists should be capable of doing this. You can find my info in the thread in my sig.
Well yeah i guess theres no such thing specifically but i was just wondering if someone would be able to do it, i mean its pretty much like drawing a character and just fill it up with black wich is far less work than drawing him with details so thats why i was asking about the prices aswell