I’m creating a single-sheet handout for the free roleplaying day and I’d like to use some of the portraits from kitty / Kathrin Polikeit. But I need to use creativecommons by-sa instead of GPL, because I cannot add a 4 page GPL license text to each handout (cc by-sa allows just giving the URL).
Therefore I would like to ask Kitty whether she would allow me to use some of her portraits under the creative commons license "attribution sharealike" (since 2015 that’s one-way compatible to GPLv3, so my worries about source/art compatibility are gone).
How can I best contact her? (her profile says that she hasn’t been active here since 2012).