Looking for a better Brake Booster

I'm looking for a new Power Brake Booster. Can't find anything other than stock out there. I was wondering if you guys have any suggestions on where to get a better than stock one that will help the stopping?
Its a 96xj, 4.0, auto tran, stock height for now.

Alot of us with the older xj's run the 96 booster, as it IS the upgrade.

i have a 96 booster on my 92 and my brakes still suck. =(