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As far as I am aware, the Torsen T-2R was not made available on either the Supra or Soarer platforms. Only the Torsen T-1 (USA/Export and JDM) and T-2 (JDM only, possibly Soarer only).
Short but interesting discussion of different LSDs for Soarers (including the T-2's) here:
INTIMAZY, I really like the Wavetrac LSD design. I contacted them a few months ago asking if they saw a market for Supra MKIV's and by extension early Lexus SC's. Despite having several random aftermarket applications for many popular tuner cars they flat out were not interested in the MKIV/SC platforms. They notably offer them for Mini Coopers and 350/370Z's. GTO's too I think.
Also... a discussion thread on SF regarding the claimed longevity of the OS Giken Super Lock LSDs:
The T2R was never available for the Supra or Soarer, despite people on ebay selling them as such. I was just pointing out that it's a nice diff that satisfies both Torsen and Clutch LSD parties.