Rail Europe may not be too helpful. I find they often don't have routes they ought to, and their prices are usually way out of whack (booking fees seem to be built into the fares). I would try RENFE or SNCF: sncf.com - no www - and look for the tiny Union Jack to get the site in English, unless your French is up to a web interface. Bonne chance.
[This message has been edited by Kitty Hawk (edited 06-19-2000).]