This site might help, but the pics aren't of really good quality. http://www.fas.org/spp/starwars/program/patriot.htm
Also, try www.army.mil. Their photo archive sections might have a pic or two of the Patriot system. Current pics would be hard to come by since the system hasn't been in combat for about a year. I would also try doing a goggle search, and maybe check out the manufacturer's website, also maybe this site will help. http://www.bliss.army.mil/ Its the Fort Bliss website, the home of the Air Defense Artillery, they might have a pic or two. Sorry I can't offer more help.