A piano/vocal songbook was published in 1977 by Warner Bros.
The entire book has been scanned and is displayed at Klaatu.org.
Why do you need to come back here?
John Woloschuk told me there were mistakes in the songbook but didn't elaborate. I already knew about the wrong riff in Anus Of Uranus, True Life Hero being in the wrong key, the missing modulation in Rugglesby... and I was aware that arrangements designed for piano/vocal performance generally omit solo sections and simplify the bass parts.