Well before i rush into anything i'm still to do a bit more research - lets face it, if it hasen't been done for the TJ you should start wondering why?
I'm looking at how the T-case fixes to the skidplate - the factory skid plate is either cast or pressed into that wonderfull shape, again why?.....is that shape important? can the t-case & rubber mount be mounted to a flat bit of plate? does it mean a new rubber mount. Just a couple of questions but i'd rather mull (tee, hee) over these questions and avoid getting something expensive fabbed up just to have it break something more expensive.
I'will be fitting a T-case lowing kit on my TJ soon and will take measurements then, I'll have a good think about it too.