I have a set of Firestone Ride-Rite airbags that came off my 2007 Titan seen here.....
http://www.firestoneindustrial.com/r.../nissan.shtml#
These are double bellow. Shows to fit 04-08 Titans 4x2 and 4x4. These were used only for about 5k miles before I took them off and sold my Titan. I have all brackets, hardware, and air lines. I am asking $140 obo plus shipping. I am in Mesa, AZ. Absolutely no problems with them and they look like new. I also have a set of factory silver 07 SE wheels with new tires. Only had 1,500 miles on them before I took them off and installed a/m wheels and tires. Tires are like new!! Asking $325 obo plus shipping. Need to get this out of my garage since I no longer have my titan. PM me if interested.