I love my locker! Yes LSD centres are readily available for hilux's
Theres a several models which came out with only a single spinner.
No, I love my locker! budget isnt an issue, if i find the car to hard to turn with wider rims/tyres on the back ill upgrade to either an LSD or mechanical air locker.
Will stick with drums on the rear to begin with, i think disks will upset the brake bias too much. But we'll just wait and see, it's easy enough to convert to a disk rear end so it can be done later down the track if feel the need