In regard to the lower grill, ditto on my buggy. Randy Forbes and others have a some good posts out here with photos and links to the parts. Use the search function to see if you see what you like. BTW, I like that "blacked out" affect on the front in the grill and fog light areas. Give me some ideas for mine. Good luck with the upgrades.
S. Maykowski, Columbus MS.
My '99 Z3 Alpine White 2.8L Speed Buggy