BLUS30270 is the normal non-updated to gold edition whatever original version that came out. It was the 1st release without all of the DLC and whatever else. That's different eboots leading to different codes. The Artemis database has 1 version of BLUS30270 and 2 from Japan, 6 Gold and 2 Gold and Japan. Mixed in is various codes with AoB in the title that are there for the purpose of making codes possibly portable from 1 version to another of the game. Those might be the only thing option you have unless somebody has the files to do things for you.