A real nice guy named Michael Taner (pronounced tanner) had some extra long/large rifle cases made for him by Boyd, and he had them for sale at the NBRSA 1,000y Nationals in Sacramento, CA last October.
He's still got some of them, and I saw them advertised here: http://scopeusout.com/
under the 'Swap and Shop' heading. His ad says: I have 15 boyt gun cases in stock that were made excusvely for me. you will not find them anywhere else... they have and extra 1 and a half pounds of filler and measure 54in. long by 12in. wide. excellant f class carry, great for 17 lb. guns double zippers.Great fo big gun barrelsect. 85.00 plus shipping. or call 916-965-8675