Do you need an accurate model (from an engineering standpoint) or just a visual representation of the product? If you don't need a complex model, you can use a

Do you need an accurate model (from an engineering standpoint) or just a visual representation of the product? If you don't need a complex model, you can use a simple 3D tool like Google SketchUp. That would probably be the easiest solution. If you've got a little money to spare, there are plenty of CG artists that can work up a model for you and render it in a photo-realistic manner.