Accurate 3D Sketchup of a VW T6.1 Transporter.

I need a very accurate (to the mm) 3D Sketchup design of a VW T6.1 Transporter. I am designing some modifications and also a front bulbar and rear bar and need a very accurate 1.1 rendering to provide an accurate starting point. Dimensions must be accurate to the millimetre. I also have a FrontRunner rack on the roof which i want to design some add ons to so want to also have this included. Right Hand Drive with a single sliding door on Left Hand Side. Windows in front section of cargo cabin. Larger size tires than Normal 235/65/17 External only no interior required. **Clarification - 3D Rendering can be done in any program you wish must but it must be delivered in a Sketchup .skp file.([login to view URL]) The output .skp file needs to be accurate to the millimetre so i can use it to design millimetre accurate modifications.