My machine is a 2004 545i / E60 / Sport. With the open lower center grille, the AC condenser takes quite a beating from stones. It has 38,000 miles and has never had any fatal impacts. However, it is starting to look rough and I would like to minimize the probabability of damage and conserve the condition of the condenser. Does anyone have a suggestion and/or experience on a grille to block incoming stones that enhances or at least does not detract from the appearance? Thanks!