Re: LX Sport?'s
I own an '05 LX Sport, but believe this information is relevant to an '03.
The VIN will not distinguish between a Sport or standard model, but the build sheet or window sticker will. The obvious indicators should be the bucket seat interior with floor shifter and the HPP package with 17" wheels. Also check under the rubber plug on the steering column for evidence of a previously mounted column shifter.
Traction lock was an $156 dollar option in '05s.
A standard CV could be modified to appear to be a Sport, but the parts would be expensive. I have seen one P-71 modified with a sport interior, but the owner pulled the interior and wheels out of a car he had wrecked.
(I installed a built 5.4 in the same car for him. The car would run with a Mustang GT, but he totaled the car again about a year later!)
If you don't have the original window sticker, check for the build sheet. I own three Panthers and have found the build sheets stuffed under the trunk mat, beneath where the spare is mounted, on all three cars.
For reference, my car has traction lock, moonroof, side air bags, power adjustable pedals, trunk mounted 6 disk CD changer, heated mirrors and trunk organizer, listed as options in addition to the sport package. There was no charge for the monochrome paint, but I didn't know that there was a chrome option. Perhaps that explains the Sport that I saw with a chrome grill.