your best bet would probably be to just purchase a regular 11-52 six string set and then buy a seperate low b. You could figure out approximately what guage you need to make it balanced by using one the many string tension calculators floating around. I would figure it out for you but most of them use excel and the computer I'm posting from has vista installed meaning no excel/ word/ powerpoint.
"It's all jagged and jaded, but it suits us. We just fake it through."