Eibach makes a 2 1/2" lift for the Sportage, the only problem is it only lifts the rear 1 1/2". Stock Jeep TJ springs will lift the rear 4 inches but you should get the TJ bump stop cups and bump stops to keep the springs centered on the spring pearch. I make spacers that I use with the Eibach lift to raise the front 4 inches and the rear 3 1/2 inches or you can use the TJ springs in the rear. The Eibach lift work good for 30x950s and you can get 31x1050s with the 4' lift.
Dennis

95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.