the awd gts and the indigo package versions in the usa are the only awd models to get the LSD. looking at parts numbers for both awd/rwd lsd diffs, you should just be able to get a lsd unit from a donor stinger perhaps or get a new assembly for around 850$ and swap it out... only the gts and indigo has the "drift" mode where it can send ~~97% to the rears alone without pulling a fuse.