A film of L'Atelier was made for French television in 1999--the blue clicky in my post above links you to a French site where it may be purchased--

As Q pointed out, it seems only to be available from European sources--I felt sufficiently guilty about getting your hopes up that I tried to find a source for you, and, given the fact that European DVD's cannot be viewed on run of the mill Western Hemisphere DVD players, found an affordable source for a player that would allow you to view it--a

In return for my kindness in this, I ask only that you refer to "The Last Metro" as a Truffaut Film and not a "Grumberg" film;-)