Funny thing. At our county fair this week I was talking to a retailer who sells Corian. He seemed interested in how the material is used for turkey calls.
He made the comment that a call maker could pick up scrap material from a kitchen/counter top re-modeler. Also mentioned that Corian comes in 1/2" and 1/4" thickness (at least that what he carried), and could be planed to whatever thickness.