See if you can find a copy of S&G Live in Ohio, USA - Nov 11, 1969. Its an underground release of the audio from a never aired AT&T sponsored TV show, recorded at Miami University in Ohio. Features " a song off our new album" that apparently hadn't been heard yet. No one responds to the opening notes of the song Bridge over Troubled water (and Artie's voice is still young and sweet). Its amazing. Plus a nice version of "So Long, Frank Loyd Wright". And the song that got the show canned by the sponsors "Cuba Si, Nixon No".
Its hard to find album but its actually quite nice.
A compilation release from later in the year is due out at some point -
http://www.kink.fm/pages/1560496.php?
The tracks are a bit different than the show I have - but I'd imagine anything from that period is very fine -
the guys were at their peak, the musicians from the BOTW album were touring with them ...
Here's what they say about the coming (authorized) release - Live 1969":
"Homeward Bound" (11/15/69, Long Beach, Calif.)
"At the Zoo" (11/27/69, New York)
"The 59th Street Bridge Song (Feelin' Groovy)" (11/8/69, Carbondale, Ill.)
"Song for the Asking" (11/15/69, Long Beach, Calif.)
"Scarborough Fair/Canticle" (11/28/69, New York)
"Mrs. Robinson" (11/8/69, Carbondale, Ill.)
"The Boxer" (11/15/69, Long Beach, Calif.)
"Why Don't You Write Me" (11/15/69, Long Beach, Calif.)
"So Long, Frank Lloyd Wright" (11/8/69, Carbondale, Ill.)
"That Silver-Haired Daddy of Mine" (11/15/69, Long Beach, Calif.)
"Bridge Over Troubled Water" (11/28/69, New York)
"The Sound of Silence" (11/8/69, Carbondale, Ill.)
"I Am a Rock" (11/8/69, Carbondale, Ill.)
"Old Friends/Bookends Theme" (11/1/69, Toledo, Ohio)
"Leaves That Are Green" (11/31/69, Detroit)
"Kathy's Song" (date unknown, St. Louis)