Yes there are LSD options, but they are pretty hard to come by I believe.
I have a 4.11 and 4.875 LSD Centres with Alloy carriers (Nismo) One is brand new, never been in the car!
I saw a 4.11 advertised recently somewhere, might have been on this forum even

If not, it would have been on Performance Forums. The asking price was $1200.