mhmmn. How bout tabbing the songs by ear? Practise/learn particular scales and practise them. Eventually,each song,not only the bands that you mentioned,has a scale,so it's an advantage. When you practise a particular scale and for example,manage to tab out a certain solo,example 'Metallica - Seek and Destroy' which is in the E Pentatonic Minor' ,it is easier for you to play and also saves time for you to search for the tab.
That's giving an example,if you know various the scales and practise them. This is IMO la.