Continuing the discussion from Did you know that clearing the cache and cookies in your Internet browser is still a great way to solve problems connecting SketchUp's web properties?:
I think you need to be more specific about which image you are referring to. It may be that the model is available in the 3D Warehouse or it may be that the author has chosen not to make it available to the general public. Not all authors opt to share their work. You may have to draw it yourself.