There was a guy making one that matched the mesh in the BOSS 302S grill. Google "boss 302 lower grill insert" since it uses the same CS lower valance....you will find a few options available.
Traded: Legend Lime V6 5 speed @ 199K miles
Now Driving: 2012 Red Candy GT Premium 6 speed MT used with 59K miles. Steeda tuned. TSW Nurburgring 19 x 9.5's w/Cooper Zeon AS. 55D springs & Koni Strt.