There are some fantastic bootlegs out there. Live shows recorded straight from the sound desk, alternate studio takes or even existing songs that have entirely different lyrics!
A brilliant website that specialises in bootlegs is the Bootleg Zone. This site contains information about bootlegs and allows you to trade bootlegs you own with other users. But remember folks bootlegs are unauthorised recordings so you could get into trouble!
Another good view on the bootlegs is by song. This way if you are interested in a version of the song you can find it this way.
» Go to the Bootleg Zone