there's a new BBC documentary called something like "the private club of haute couture" where the interviewed ladys who buy haute couture, and also filmed at chanel rue cambon office. there's also an interview with karl, and they show the creation of a couture dress (for FW06/07, i guessed).
I haven't found it on youtube yet, and unfortunately i don't know when they will show it again......(myself saw it couple of weeks ago)