I'm not sure that there is anyone breeding for these specific charecteristics.  As for the pups I have several people who want pups from my Sire already, as long as they don't come out retarded.  I crossed him with a Pitt once and we got a beautiful Bandog but she ate all but the one we saved.  This AB is simply the best all around dog I've ever owned.  And yes by standard I mean Scott, the classic Bully types for me are way too problematic and quite simply not functional at all.  I may just have to break down and buy a female AB.