Slate or glass, glass over glass, glass over slate, etc... favorite wood, etc... Raspy or higher pitched? I found this guy on Facebook and I really like the looks and sounds of his calls. Super nice guy to talk to and very helpful to ensure you get what you're looking for. His name is Dustin Jones and owner of Blackstone Custom Calls. Here is the link to his Facebook page: https://www.facebook.com/dustin.jones.3766
I like my glass call from Hooks Custom Calls. I personally like a decent amount of rasp don't like real high pitched calls.
Double S custom calls Hard to beat these custom made pot calls. The Gobble Stopper version on the linked page is my design! Jon does Awesome work! Turkey Calls