There were two Slanes in 2001, so which one are you talking about? And yes, there are audience recordings of both of them. There is also an audience video of Slane 2 (which is of the complete show, I think). And there are several VCDs/videos of the various Slane specials that showed up in various parts of the world (which is not a complete show). Of course, non of these are official releases.