I fitted a lower front grille today on the new car. It fits directly onto the existing grille. Some may wonder why I've bothered to do this. The reason is because on the last 500 we owned, the fins on the aircon condensor got pretty trashed. Personally, I think the holes in the stock grille are too big, but everyone will have their own opinion. Anyhow, I decided to fit the grille in the following link which is made specifically for the 500. Black like the one in the picture. Easy fit, clips directly onto the stock grille and looks neater imho:
http://www.zunsport.com/fiat-500--lower-grille-p331
http://www.zunsport.com/fiat-500--lower-grille-p331