Rail Europe Group is a privately-held company of which French National Railroads (SNCF) and Swiss Federal Railroads (SBB) are the majority shareholders. Rail Europe is the leading authority of European rail and related travel products in North America representing more than 35 European railroads.
Also consider point-to-point tickets if your train travel will be limited.
Contact Rail Europe: (888) 382-7245, www.raileurope.com.