I don't think they have been faked yet, or ever will for that matter because they are cheap bags.
However there are imitations of them in dollar stores and such.
i can't decide if it was a 'fake' or an 'inspired' but i saw a "vera bradley" villager strikingly similar to the apple green pattern. with the large blue paisley trim and all! but the alignment was sooo off and the colors were weird.
I would think that the fabrics would be hard to get a hold of... especially since the fabrics have the Vera Bradley signature throughout. There are definately imitations out there though.