E3 expo - 2001-2003.. Wanted item

[tsquared44]

Hows it going guys and girls. Im looking for an item from the 2003 e3 expo i believe. These were the years of the first two halos. Cortana --i dont know her real name-- was signing fairly small sized lithographs for fans. The litho contained a picture of cortana obviously. If anyone has seen her signature on some artwork or know exactly what im talking about, i would love to know where to look, thanks alot.