I read the review in my local Street Mag "Rip It Up". They are released thru Warner Vision, at 39.95 each. The Priest one looks better value for money at 110 Min, compered to 50 min for the Metallica DVD. There mus be a series under the title Classic Albums, so there might be more coming out in the near future.
Just ask at your local Record store they should be able to tell you if they have been released or when they are due.