I am wanting to buy a deluxe cab frame for my HPX but my local JD dealer told me over the phone this morning that they only come on new units.I am not sure if he knows what hes talking about .I know Getgreenparts.com sales them but I want to use my JD card and not have to pay $300 for shipping.Does anyone know the John Deere part number for just the deluxe cab frame ?