Why do you NEED to get the one that comes preloaded with the hacked bios anyways? Buy whatever is cheaper (either blue or white DuoX2). It takes all of 30 seconds to flash to the hacked BIOS.
Just download and burn a BIOS DVD from "the usual place". After you mod with a white duo, boot on bank 1 (second bank) which is flash bios, select flash fom Disc, drive pops open, stick disc in, 20 seconds later your system turns itself off. It is done. that easy. So no sense in worrying about if you can get a chip with or without the bios on it.