Mine are from a German company called "Delta", bought them through
www.offroadcentre.nl, can't find pics on the Delta-site. I'm running the "small"version, there's a wider version available. They were very expensive ( I seem to remember over € 300,- ), broke the ones on the left side when I flipped the Zuk and repared them both with FibreGlass, no problem, look like new !!

They're cut for the standard front- and rearbumper and have a triangular hole for the rubber sideprotection on the sills ( I cut mine on the front, running a homemade frontbumper )