For an Etruscan bronze votive which also has "the serious and pathetic expression of the face, the arrangement of the locks above the forehead, and the studied twist of the head" which "are clearly inspired by portraits of Alexander the Great" see no. 81 in True, et al., A Passion for Antiquities: Ancient Art from the Collection of Barbara and Lawrence Fleischman.
Vermeule and Eisenberg inform (op. cit., p. 30) that "images of Alexander the Great in Etruria," as in the Greek and Roman worlds, "can be identified as Dioskouroi." The presence of the egg in the right hand of the Morven bronze confirms this identification. For images of the Dioskouroi with the egg of Helen, their sister, on Etruscan red-figured pottery and bronze mirrors, see nos. 71-76 in De Puma, "Dioskouroi/Tinas Cliniar" in LIMC.