Try guitars101.com/forums & check out bothe the lossless & lossy forums. I've found plenty of not only Metallica bootlegs but many other bands as well like Led Zeppelin, Pink Floyd, etc. LOTS of boots from the 70's & there's always new boots getting posted everyday, as well as a few rare gems that can be found there as well. Certainly worth checking out.
Finally, there's kiwiconcerts.blogspot.com, which is boots of shows in New Zealand primarily. Some pretty good stuff like Alice Cooper & The Who & anybody else who's polayed there. Hope these help ya out some!
I've only loaded DVD covers...but I do have a cover I made for this one. I'll eventually load my CD covers as well...but here's a start! Hope you like it!