You can read about him in today’s Guardian.
The richest online Kagel offering is at UbuWeb, where eight videos are available to view or download at no cost. The video aspect is crucial to capture the theatricality built in to so many of Kagel’s works. Match is there, as is an incomplete (36 minutes out of 100) version of Ludwig Van. Acustica is also a great listen.
If all that leaves you wanting more, scroll through the books, CDs, and DVDs available through this slideshow: