They released two eps for the first time in about a decade in 2010-2011. They're obviously not a "let's see what we can cram out every two years for a record label that we signed with for 5 releases" type of band.
Surely they must have their own copies of the tracks somewhere. They should just release it and see if Warners come after them. . . I'd wager they don't.
They probably don't even know what a Head Automatica is.