here is a pic of the emblems from 8MA600. The originals are above the repros. After looking at the quslity difference, i am going to restore the originals. The "Mangusta" logo has a broken mounting tab. The one that the guy is selling on ebay doesn't look like it has tabs at all.
I do not know if these emblems were mounted on the rear grille, but I will find out by inspecting under the rear hatch for holes.
Jay