Hello Harald,
I'm sure there's a lot of this around - check out any local charity shops and carboot sales- although I don't remember him, I do know about him. I come across a lot of his books in charity shops. Videos are very cheap in charity shops & bootsales right now, as the world is now at DVD, MP3 and beyond.
A quick look on ebay might be worthwhile for the videos.
I'm sure you'll find some interesting stuff on youtube.