Great Planes offers a 3 1/4" spinner with an aluminum back plate and a nylon cone in white, red, black, or yellow. They are available thru Tower Hobbies @ about $15.00. That's the largest "plastic" type spinner that I know of. Larger than that, you will need to go to the more pricey aluminum type. "If you wanta dance, you got to pay the fiddler".