Sorry, homes. Your car is very different than the SRT-4. The engine, trans, wheels, tires, front seats, and more are different, so there's no easy upgrade that way for ya. If you want the body parts, ask a body shop if they can help you out, but it will almost cost you dearly. You may as well buy an SRT-4.
If you wait long enough you may find an SRT-4 in a junkyard somewhere with the body parts you want. Do a national search.