Have you tried contacting the NWTF home office? Couldn't hurt to try.
Dixie Belle Handcrafted Turkey Calls
NWTF Mid-West 2013 4th Place-Tube Call
NWTF Mid-West 2013 4th Place-Scratch Box (First Time Entrant)
Home of the "REBEL YELPER"
Remember "The shade comes free with the tree"