You would need to look into installing a coil spring spacer or as the Jeep crowd calls them budget boost. You could also look into getting 4 coil springs from another vehicle that has the same size coil mounts.
ctruss what do you base your suspension opinion on???? I agree it is not the best way of doing it but it is not as bad as you say it is. I speak as both a Jeep enthusiast and also an engineer. It does affect the amount of suspension travel but we already have very little. It is the same principle as using stock struts with shorter springs but in the reverse. You are making the springs longer.
It would take a very long time to destroy a set of coil springs with a budget boost and is nothing like cutting springs to lower a vehicle. Cutting the spring changes the spring rate and the spring mounting point. That is very dangerous.
I think he sees the best thing to do is stay on 16 inch rims and use the rite to lift it and maybe add air ride to it.