Looking at the music of Dutch rock band Focus, started in the late sixties by Thijs Van Leer (b /31/03/48) with Jan Akkerman (b 24/12/46). Van Leer still performs and records under the name today (official site here). Akkerman's site here.
The last time Akkerman and Van Leer performed together was in 1993. In 1999 and since 2000 Van Leer has revived the band under the name of Focus. There have not only been studio albums but many, many concerts. Since the 1990s things have changed exponentially as far as live recordings are concerned. The story of the bootleg has turned to a new and perhaps less exciting chapter. The new Focus have themselves produced a number of official live albums in various formats including - Live in South America (2002), Live in America (2003), Live in England, Live in Europe (both 2009). No doubt trips to the far east and Australia, not to mention the Arctic (!), will lead to further albums.
Meanwhile a plethora of good and bad recordings have become available from the past ancient and more recent. Youtube alone has an abundance of material. Available recordings today include concerts in Brazil, Canada, England, Holland, Mexico (2002), Brazil, Chile, France, Holland, Japan, Mexico, Scotland, Wales (2003) England, Scotland (2004) Holland (2006) England, Mexico, Holland (2007) Germany, Holland, Wales (2008).