...
The german company Beta-Layout offers a variety of services and is usually quick and cheap to make a couple of board to prototype.
Alternatively, there is also Eurocircuits, which offers more options (auto panelling, soldermask colours) at a slightly more premium price.
R2 Prototyping
The Swiss company R2 Prototyping offers a complete manufacturing service. They will also do a manufacturing review for more complex layouts.
...