the grilles for the '13s haven't really been released by most companies yet. Neither Saleen or Roush have released their '13 grilles. Just fyi the grilles on all models of the 2013s are the same, other than the gt500. So once the '13 grilles come out, you don't have to find one specifically for v6.
The only place I've seen anything close to what youre talking about is on LRS, they have the california special black billet grille for the '13s, but if you buy both the lower and upper its upwards of $800.
To answer your question, no none of the '11/'12 grilles will fit your car, and AM hasn't started selling the '13s yet.
2013 DIB 3.7L | 6AT | Performance Package | Tech Package |
Bama 91R | Airaid CAI | Flowmaster Force II Axlebacks |
Pioneer TSD's | Amp & 10" JBL sub |