As I am a brewing rookie I can offer no knowledge only support. I too have a love for the Brutal Bitter but no way to make it. From Rogues website you can get the malts, hops, and IBU's etc. I am guessing some of the character from this beer comes from the yeast, Pac Man, maybe. Maybe some of the experts can devise an extract recipe for us.
BTW, do you live near philly?