I'm guessing a "spring isolator" is the black piece that sits between the spring and the axel? That black disk-type thing? A half an inch on the rear i think would look pretty good. No issues with 3 inches of lift in the rear is there? Or how much they are from Jeep? Does anyone know where to get an extra couple of isolators of rthe liberty? Does anyone know where to get an extra couple of isolators of rthe liberty?