Service bureaus.

Select a service bureau by first selecting a rapid prototyping technology.
Use the rules of thumb below to select a technology to try. Many service bureaus will have more than one technology available, but very few have three or more. A good idea is to stay geographically close to home at first. This gives you an opportunity to meet with people and see their operation, and most especially to obtain a certain amount of education. Some service bureaus argue that a large fraction of their business comes from files sent over the web and that in these modern times human contact and geographic proximity is not necessary. That's true, but until you're educated stay close to home. It makes it so much easier to communicate your displeasure. Go farther afield later when you're shopping for price.

Select a service bureau that will provide the vertically integrated results that you need. Most have special abilities and experience. Select one that has all the services you need to get usable results. Additional information about selection criteria can be found in the service bureau directory pages.