The so-called "disco Novas" don't typically get a lot of attention from the aftermarket, but now Classic Industries has introduced a replacement grille for ’76-78 models. It's standard front grille is part number 466818. 

Manufactured by OER, these all-new reproduction front grilles install onto the radiator core support of 1976-78 Nova models. These grills are manufactured in plastic and electroplated with chrome for a beautiful shine, and each grille features the correct black accent edging as original.
 
Produced with the correct shape and contour for this generation Nova standard models, each grille features all correct mounting points and is carefully designed to install and appear like factory original.