Many thanks to siggyparkersgeneralstore for sharing a photo of Keanu on instagram. Photo appears to be from the My Own Private Idaho time period.
Many thanks to @DJRossstar for sharing a throwback photo from the Shadows book signing at the LACMA on twitter.
Update: Many thanks to @NazariyD for sharing his selfie with Keanu on twitter. the photo was taken between takes during the Siberia shoot in Marquette, Manitoba. The photo also appears in an article on pg 19 here.