M105A2 requires no air to move. The air is used only to apply the brakes. Trailer for pickup, thats easy. Any of the M101 trailers to include the M116 chassis with genset decks. A2 has 8 lug axles and surge brakes, the A3 uses HMMWV rolling stock and has the fender wells moves outoard. What will the trailer be used for?
Edit, The drexel guy beat me.