If there was such a manufacturer making a wider seat, it probably would be against any safety regulations. Especially, if the seat was designed to hold a child. I don't think John Deere would ever think of such a item. Most all vehicles that have a seat for two people, usually have doors to prevent the passenger falling out... golf carts or JD Gators have seat for a second occupant, but, they don't have blades under the cart.