If there's a powertab or guitar pro file for a song that seems to be perfectly transcribed, it's often just a rip off of a TAB book. I've seen one for "The New Order" once but it was horribly expensive.
I have an exemplar of a guitar magazine from a few years back where Eric - the man himself - goes through Testament's most known riffs (like Pratice, Haunting, Into The Pit etc.). I treasure that fucker!
