http://www.sare.org/Learning-Center/Books/Steel-in-the-Field/Text-Version/Dryland-Crop-Tools/Wide-blade-sweep-plowhttp://www.sunflowermfg.com/products/index.php?id=49&sID=64&pID=132
Picture of mine I could find right quick. Most have 5', 5.5' or 6' wide blades.