well, maybe one day you can have your 6spd sc400, hehe...
anyhow, im quite sure you can bolt in the a03 torsen LSD from the 96.5-02 supra TT's
there was also an a02 LSD from the n/a mk4 that had a lower ratio.... cant remember if it was a 3.5 or a 3.8..... probably the latter....
the b03 from the 93-96.5 mk4 will require the rear tailshaft along with the driveshafts as they are different length.....
all this info can be double checked on ALSC... those guys know everything soarer related.