sounds definitely NOT a cobra....
COBRA had a 6 sp. narrow gate manual transmission
...forget bodykit its easy to get aftermarket bumpers and hoods that have cobra design.
if you are searching for a cobra make sure and use a VIN decoder to identify the car (along with full carfax report)
here's a mustang 03 VIN decoder

http://mustangattitude.com/mustang/2003vinmatrix.shtml

once you have found your car its also a good idea to have a pro shop do a quick once over (brakes suspension and compression test).

go to this forum and register.....its a performance mustang owners forum and they have one forum dedicated to the terminators (03, 04 cobras...) you will learn a lot about the car you are interested in there.

http://www.svtperformance.com/

cheers04 cobra