Two words…..
Costal Seafoods, one in Minneapolis, one in St.paul, I bought some there once, it was actually very good, nice clean white meat, light taste, I pan fried in in some olive oil and little salt and peppar, seemed pretty tasty to me. I suspect they could probably get it fairly easy, probably have to order some in. I also think it’s probably a white sturgeon, I want to say they said Washington, but don’t hold me to it. The fish I ate was suppose to be farm raised.
http://www.coastalseafoods.com/
Knowing how old the keepable fish are and how long it takes them to reproduce, I couldn’t catch and kill on myself, I suppose if one wasn’t going to make it that would probably change things, but not intentionally.