There is a few threads kicking about on here on how to mate supra disks to hilux rear ends. I've never done it, so I got NFI, but there is threads on it. Probably other options out there two, as people have put hilux diffs in almost everything.
As for LSD, you should be able to source an LSD in varying ratios from a 4x4 wrecker. My LN106 lux has a 4.3 LSD, and the later model KZ 130ish series I think have 4.11 or maybe 3.9. Plenty of after market options too such as true trac.
IRS G series can be made to fit too (such as MA71 3.7LSD), and there is threads on that too.
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