Ok, so if one reads old gun rags, it would seem that back in the day (not entirely certain when that was) there existed true custom pistol smiths. I mean guys that could build you whatever you wanted. Not a smith that did a trigger job, shortened and ported a barrel, or machined a rib for mounts. I mean really could take a concept and build it. Do they still exist? If so who are they?
Have a crazy idea surrounding a Ruger Super Redhawk. It would need someone who could rebarrel it in a custom caliber and build a replacement cylinder.