need a water proof trunk

[Water Warrior 2]

Do a Google search for shields. There are a multitude of choices from many sites. Most universal shields have either 7/8 inch clamps or 1 inch clamps or an option for your needs. The GZ has 7/8 inch bars.
Bear in mind that if you get a larger shield that offers hand protection you may have some difficulty with the front signals getting in the way. Be prepared to mess with it a bit. A large shield and heated grips are wonderful on a chilly day.