Specifically, this is "Heroes and Villains: Part 1 Tag" (disc 2, track 11 of The SMiLE Sessions [Deluxe Edition Box Set]). I learned the clavinet part back in May, and yester-day I learned one of the two piano parts. Here's the notation, with - as always - the disclaimer that I might have something wrong.
Clavinet (notated an octave higher than it's played):
Piano (the last half note is held longer; I just didn't want to have to include any more measures):
