I was trying to book train Paris to Antibes for mid-April and tried to use the http://www.idtgv.com/fr/reserver/ but there is no train Paris/Antibes listed (closest is Nice or Cannes). I found the train I want on RailEurope UK site but since I am from US it won't let me book it - the address form forces UK addresses only, you cannot change country when filling in credit card billing info. In the past it's been recommended to say you are from the UK as it is cheaper than US, but it appears to no longer work. Fares via the US site are double. Any suggestions?