LSD options for s12 (irs)

Hey, I\'ve seen the inside of a clutch type lsd, but what the hell are the lsd things that peole use that are like a little square with two sides that goen nside your carrier and between all your side gears (or spider gears rather)
and is there any for our type of r200?

phantom grip  (or \"slips\") they try to work like a clutch type LSD but they\'re a mixed bag they might work great in some applications and in some others they suck.

Cheap though...