I have come in contact with a person that makes his own custom slate calls. He turns his own pots made of many different kinds of wood. for example, I have two (one made of zebra wood, and another out of maple). both sound extreemly good, plus they have a great look as well. I would recommend them to anyone.
I am sure he would do custom work if requested. If interested please contact me at:
Rob Akers
2795 Shannon Hill Road
Columbia Virgina, 23038
robak4@aol.com