Air on a Chrysler Concorde

My little brother was asked to install an air setup on a Chrysler Concorde so ive got a question. Im guessing since the car has struts up front the guy should get air struts, but i havent had a chance to look at the back. what would he use on it? cylinders? and lastly, wheres the best place to get the air stuff for a car. Hack Shack? i havent dealt with cylinders or the struts much so im turning to you all for advice on parts