My Borla dual tips are angle cut but most of the tip is in the rocker panel. You might go to
www.borla.com and see if they sell just the tips.
Here's a pic of mine. Mine's obviously not a Fox Stang but it might help in your search
Borla dual tips
My kit is the Rebel 500 setup. The angled tips are very similar to the Bassani tips and they might sell just that part.
------------------
66 Tahoe Turquoise Coupe
Laser Red 96GT Ragtop
Both are slow but easy on the eyes!