This is a promise brought up by modern information technology, that has become true. It is made to order and mass customization realized for car building.
Local Motors is the company providing the platform to design an own car, bringing together designers and engineers worldwide and realizing to build the car in micro factories.
I guess there is nothing better to do than to refer to the website, which contains all the information to start immediately to build an own car: Local Motors
Directory Sources: Mass Customization