To meet demand we have set up shop on Shapeways.com.
This shop allows you to directly print designs with professional quality (accuracy typically <150 microns).
This store can print in various plastics, acrylic, porcelain, but also metal.
For each print, a part is donated to the association.

To inform you, a plastic trumpet mouthpiece is <12 $, metal <75 $.

You can also print things from sites like hubs.com that can show you individual and professional in your area who can print for a lower cost.

To inform you, a plastic trumpet mouthpiece is <4 $ near Nantes, France through this website.

Overall in the description of each project advice will be provided to you to find a printing service that suits the subject.