the dual sidedraft manifolds are around - I paid under $100 for mine. there have been a few single sidedraft weber manifolds from aussie land on ebay for 255 and up. Before I got the dual setup, I thought of cutting up a regular manifold and grafting a single sidedraft carb to it. I even saw a manifold adaptor for 1 or 2 sidedrafts that bolt to a downdraft manifold in place of a 4 barrel carb.