Elton John songs...which albums?

I have purchased most of Elton John's early albums, but I have not been able to find "Blue Moods". Was this album ever remastered?

Was the song "Don't go Breaking my Heart" with Kiki Dee ever released on any of his albums?

I know I can find both songs on his "Greatest Hits Vol.2" but I don't know if there is a remastered version. I've looked and never found one.

What about the songs he performed with John Lennon on Thanksgiving in Madison Square Garden in 1974? Was it just the live songs, or did they do anything in the studio?

Were these songs ever on an album?