Heh heh ... I guess I collect them as they come up. Your best bet is to check out Ebay. You never know what comes up from week to week.
Unfortunately, the car is lacking in both LSD and suspension work in the performance department. No hurries though but if an LSD ever becomes available, you'd bet I'll be there in the competition.
I already have an open rear disc diff so I just need to find out whether it is the later 86-87 model or earlier one. Even then, I'd be limited to a Cusco one as both TRD and KAAZ ones aren't made anymore.
People have to realise that AE86 parts are getting harder to find these days so you'd best be prepared to fork out the $$$ for what you want ...