Saw an article on motoiq where they installed a Cusco LSD unit to replace the stock viscous 370z unit. After looking through cusco's catalogue on their website, it appears they do make an RS as well as MZ unit for the z32 turbo and NA. It also appears that some of the 240sx's may have shared the same diff as the z. Maybe this will provide more resources for finding someone to build them.
How many of y'all have the stock unit? Does it actually work?