Elton John Superstar Concert Series, 2-CD Radio Show, broadcast in 1994.  Two separate concerts, the first on Labor Day 1973 (four tracks).  The second is from the Walden Woods Benefit in 1993 (11 tracks).  See scans for track listings.  This is an original 2-CD radio show, so it includes ads and all, as well as great live music with great sound quality.