I have a friend that makes box calls. he uses different kinds of woods and does some wood burning on the them. He sells them for between 20 and 35 dollars if I am not mistaken. I have one and I really like it (I should buy another)

This link is kind of old...it was put together by someone for a college Web Design class and hasn't been updated with new calls, I don't know if he still has any of the calls on the web site or if they have all been sold. I am sure he has some completed calls and can custom make them if you would like. Also I don't know if the e-mail on the website is current so if you attempt to e-mail him and don't get a reply sent me a pm with your e-mail address and I will get it to him.