There's only one Ironman lift for the kj. Click here --->
Econo Lift Kits for the KJ . The only place I'm aware of to buy Ironman lifts. The only options are regular or heavy duty front springs, but both give the same amount of lift. If you're going to run a winch or aftermarket bumper go with the HD springs. Some recommend going HD even if you're not. I'm running HD OME springs up front and love them, not a harsh ride at all. The consensus on the board seems to be that OME gives you a tad more lift while Ironman gives you a tad better ride. I'm running a combo up front, Ironman in the rear and I love the ride.
They advertise 1.5" of lift for legal purposes (Ironman is Australian) but you'll get more like 2-2.25". Go with OME (Old Man Emu) and you'll get 2.5". If you want more lift, you can throw on a top plate, a couple clevis rings and you can easily get up to about 3.5" out of these kits. Of course if you go 3" or higher you'll need JBA upper control arms, or else your stock arms will come into contact with your springs upon full suspension droop. Tell us what height you want to be at and we'll recommend what to get. But from what you've said so far, check out the Tommudd kit on the link I sent you. That includes everything to get about 3.5", including JBA upper control arms, but does not include bumpstops.