Final pieces to the jigsaw of the Early and Middle Bronze Age comes in the guise of single rider 4 Onager Platform Carts for the Sumerians, Akkadians, Early Elamites, Zagros Highlanders (Gutians and Lullubi); and later Platform Carts and a Proto-Chariot for the Later Amorites and Sumerian Successor States of the Middle Bronze Age.
New 28mm Cutting Edge Sumerian/Akkadian Platform Carts
Cutting Edge Miniatures has some new Sumerian and Akkadian platform carts (sort of what came before chariots) over in their webstore. Go check 'em out.