Also, I would report the attorney to the bar association, or at least threaten to. THAT is who they have to answer to.

They had better be able to come up with those files. I would file a complaint with the higher ups. I am going to assume you meant attorney? Not authorities? Your attorney can get in a LOT of trouble for not keeping your complete file together in the first place. I personally take a photo of EVERYTHING that includes legal documents and save it to my own computer files. As a safeguard against the loss of things by others.