I answered my own question from the previous post. I remembered Cafe Press and sought out bumper stickers and gear at its site. Found two stickers for my newly liberated van plus a cap that bears ears of corn and the slogan: "Corn: It's not just for dinner anymore." See a sample above.

My grandfather, Raymond Shay, came from Iowa corn country. He grew great corn in his Denver backyard, and advised me several times on proper corn growing techniques. Wonder if he would use corn-based fuels? Wonder what he would think of his Iowa National Guard unit fighting in Iraq to safeguard Middle East oil supplies? He enlisted in time for General Pershing and his Mexican border war, and stayed on to go to France with his Iowa cavalry unit in World War I. In my presence, he never questioned the rationale for his war. He grew great pleasure in gardening, and did it well into his eighties.

This fuel's for you, Grandpa.