sara,
I am sorry to be a wet blanket,but what hillwalker is looking for is the STAGE production of Les Mis,not the Concert version;the only one that is avaialble on DVD at the moment.
As far as I can see from Googling,there is no DVD of the stage performance,or a film of Les Mis.
This is what Amazon has to say:~
Amazon.co.uk Review
The 10th-anniversary-concert video of the international musical sensation Les Misérables might be the best thing to appease fans until a full-fledged movie comes along. Or it might be even better, as feature films are often subject to extra musical casting considerations and this 1995 dream cast is superb. Reprising their roles from the original London company are Colm Wilkinson (Valjean), Michael Ball (Marius) and Alun Armstrong (Thenardier). From Broadway come Judy Kuhn (Cosette), Lea Salonga (Eponine) and Michael Maguire (Enjolras); from a later London production comes Ruthie Henshall (Fantine); and from Australia comes Philip Quast (Javert).
I have the Albert Hall Concert on CD,and I think that the DVD of the same would probably be better than a film (As Amazon says).
I can't see(given Hollywood's attitude to musicals) a silm of Les Mis now or in the future.