It was a few years ago, but I was able to recover some things for a
mixer that eroneously deleted pro tools files using software called
D.R.T. (Data Recovery Toolkit). A Mac tech friend of mine had been using
it for recovering data from damaged drives for his business clients. I
don't know it it's still available, kept current, or has been eclipsed
by now, but at the time nothing else worked and D.R.T. saved the day.

--
Jay Frigoletto
Mastersuite
Los Angeles
promastering.com