www.mikes-elektronikseite.de/, A german site, where you can order custommade PCB's one by one for less than 20€. A good service when trying out new designs, as the bigger companies take well over 100€ per prototype board at smaller series.
All you have to do is send him an eagle file and he will make the board. Eagle is a PCB and schematics layout program, that can be found on the internet. a freeware version is available from Cadsofts homepage, or read more about it on this site.