I know this isn't a vertical grille, but it is a cut-out billet grille! I agree the bolt-overs look like crap, it will be worth your time and effort.
http://www.gmtruckclub.com/forum/attachment.php?attachmentid=1707&stc=1&d=1231996457
http://www.gmtruckclub.com/forum/attachment.php?attachmentid=1707&stc=1&d=1231996457