There is a guy on the QDMA site that makes excellent slate calls. They are works of art and they sound great too. His handle is Masvet or something like that. If you are not a member of that forum, let me know and I will track him down for you.
Tks everyone for your speedy responses. I messaged Scott on FB last night and he was quick to respond! Unfortunately he is leaving for vacation and wont be able to make a call in time for fathers day but Im still gonna have him build one and give it to my father in law for his birthday. I will be sure to post pics of it.