for 3-6 inches, you can do a TT/Shackle/AAL + a 3" body lift... but as far as suspension lifts, theres the superlift 4" (now discontinued, maybe you can find one still), the rough country 5" lift for rangers... but the RC lift only works for the front on ours, so for the rear you can go with the OME CS042R leaf packs+ warrior shackles, or i think deaver makes a 5" lift pack for sale on the GoFastExplorers website... perhaps
@Travisfab can confirm if it could fit a 2nd gen, but i assume it would... hope this helps!