Hi JHB,
Essentially, you'd need to commission a CAD tech with 3D printing experience to produce the item in a CAD format suitable for printing. For a coach say, you are probably looking at €2000 or so in time / cost for that bit.
Then, upload to shapeways or a similar service, and you'd probably pay between 60-100 euro per print, assuming high end materials, and a moderate number of parts and size of parts.