Oh - and feel free to post this image into my "Species We Have Lost" thread as this species was unrepresented in the gallery as far as European holdings went until you uploaded this image.
I just looked back at my notes and I too saw the Sanford's Lemurs in October 2003 (on the 5th to be exact). However, by the time of my next visit on 30.05.2004, they had gone.