This...
It's a 2" wide vortex generator used to eliminate the infamous A320 howl. I am writing a short case study about it in a book on aircraft mods. However, I don't have access to an A320, and I can't get an answer out of anybody who has posted pictures online about permission to use their pictures (this photo I can find on both Lufthansa and Airbus websites, but I can't get an answer from Lufthansa, and there's no obvious contact for Airbus).
Can anybody do me a good photograph or two of it, and (vitally to keep my publisher happy!) an email with it giving me permission to reproduce the photograph. My pprune mail box is permanently full, but I can be emailed on boffin at engineer dot com.
G