I saw a demo of a scanner that was replicating a Mini Cooper, using a zillion little dots that the scanner reads. Seems something like the Motion Capture that's used to copy human motion for movies like Avatar, only for static objects.
Another alternative is Rapid Prototyping, which is mostly used for new product development; there's a company out there making model parts this way, such as a D Jaguar body and a variety of engines, using this process – TDR Innovations, a frequent contributor to this forum. You might contact them.
http://www.modelcarsmag.com/forums/index.php?showtopic=23465
Since the parts are replicated in very thin slices, there's a certain amount of jaggedness that requires a lot of sanding, but the demos I've seen come out with good results.
It's pretty amazing what it can do (such as produce a car engine with moving parts in one pass) – described at greater length here:
http://en.wikipedia.org/wiki/Rapid_prototyping
The 3D printers used to produce the product vary substantially in price and size; the cheapest one I've seen is realtively small and goes for nearly $15,000.
http://uprint.dimensionprinting.com/ppc/?adver=google&type=cpc&camp=google_Printing_3D_Printer&gclid=CKv7oIvR1KECFRcXswodgGvtIw
In a few years, I would expect the cost to come down substantially. But you'll still need to know how to use a CAD program that makes it work.