The Volkswagen Type 147 or more commonly called a Fridolin, was built for commercial work use in Germany’s Post Office. They came from the factory with a 1.2L or 1.3L flat-four engine. This modified version comes from Tilburg, Netherlands with a 6.0L W12 engine and six-speed. The build thread was started in 2005 and has 111 pages (at time of writing). This is another one of those great build threads where the builder posted frequently since the beginning giving you a good idea of the level of work it takes to make something like this.
Update 5-12-2015: Speedhunters photographed it at Bilsport Motor Show 2015