Mike Mann at White Creek Gunstock Blanks in Oregon would be my choice for the blank.

 

Cecil Fredi. When I was heavy into stockmaking (1990-2010) I would tell Cecil I was in the market for an English Walnut blank in the $$$-$$$$ range that had some of these specific features: side-to-side symmetry, mineral streaking, feather crotch, quarter sawn, etc. He would send me photos of a half dozen blanks matching the description. I'd drool over them for days before finally making my pick.

Watts Walnut was also very accommodating with respect to Am Black Walnut. I love bodaciously figured wood, but for certain projects it can be overpowering and just inappropriate.

 

Doug Bracher has exceptional turkish walnut.

 

Another vote for Cecil Fredi.

 

Gunstock Blanks | Gunstock Wood| Texas USA | Best gunstock LLC Does some awesome blanks
Ask him to give you Ferenc Francia's contact details for the stock work.
Ferenc does some amazing work.

Francia and Francia Bespoke Gunstocks LLC