I've got the same Jeep as you. What I did was get a Yakama rack consisting of 2 low profile channels that were mounted to my hard top, with 4 tower mounts. The whole system adds maybe an inch and half height to the top. When I want to use the rack it's a 2 minute process to lock in the towers/ racks into place. I don't have pictures, and my Jeep is down at my camp while my daughter is home from school so I guesstimated at the dimensions but you should be able to get them off their web site. This system has worked out real well for me over the last five years. I use the "J" style supports for my Yak, and Yakama"s "L" brackets for my canoe, and there is room for both on the rare occasions that I am transporting both.