Reading in a copy of Smithsonian Magazine today I bumped into a reference to one of these 3D printing operations that will contract to produce stuff for you--in metals, plastics, and other materials. Turns out they make things for small-scale internet retailers and hobbyists. News to me. Went looking through their pages. They have a whole "mechanical" section that includes stuff for current and older production cars. Turbine for $9, anyone?
Turbine by Vulpodrac on Shapeways