WTB-Looking for a Premium in stock 6x45mm barrel

Anyone know if anybody stocks premium such as a Krieger AR barrel chambered in 6x45? Not looking for a cheapy that might shoot, wanting something I know is better than a 50/50 chance of sub moa for a special setup. Had read that Les Baer was discontinuing the 6x45 and see they have barrels available. However, for $500+ I want to know what brand for sure I am getting and not a guess, really want a Krieger or Bartlein at least 20" and thinking maybe up to 24"??? Fellow here just acquired a complete Baer rifle and I made/loaded him some rds but he hasn't had time to shoot it much. Last conversation I had with him he was a bit disappointed in what little he had tested so far. Said first 3 usually around 1/2" then it would start opening up???

Any experience/comments with this caliber in a good AR platform is appreciated. Thanks all.

Respectfully,
Dennis