SNCF really pisses me off. When they ask you to choose a country, they won't let you choose ETATS-UNIS or CANADA!!! But you can choose IRAK!!

Nor will they list one single contact phone number on their entire website where I could make a reservation over the phone. They are making it very difficult.
I know they want to save money by forcing people to book online. But this is ridiculous.
Anyway, I finally found the number through a secondary source:
08 36 35 35 35
The country code is 33.
You can call and order the tickets over the phone. You can pay with a credit card and you can pick it up when you arrive in Paris. I did this two years ago for Thalys.
The SNCF representatives are friendly. They will explain in detail what they have in terms of sleeping and seat accomodations.
Never buy from Rail Europe. C'est un grand ripoff.