I don't know of one. We always use our laptops for that kind of thing.
But I was wondering if you are going to need a different kind of charger for over there, because they use different current, so I thought I'd mention that.
Here's a site that might be useful.
http://www.enjoy-europe.com/hte/chap11/electric.htm
And I know it might be hard, but your children are lucky enough to go to Europe!, so why not let them have the full experience and not take the DVD. It would be sad if they came back and remembered France as "The place where we watched The Little Mermaid five times!".
Being stuck in lines, on trains etc is part of the experience. Planes will have movies, though maybe not cartoon type. But give them some books, puzzles or coloring books with special crayons that they've never seen before on the plane. Make it special. I bet you can find coloring books and young reader books on the places you're going.
Have a great time. Your children will likely rise to the occasion and amaze you with great behavior.