Wanted navigators control from a Phantom

I need a joy stick with a wheel on the top from a Phantom, navigators control.
Its for an ex Phantom navigator and I wont be making any profit out of it in fact it will be a gift from me, although of coarse I am happy to pay for it if someone can source it for me??? sorry I dont have a picture but I am sure the Jet enthusiasts will know what it is.