Hi i know where u can find a pict of a beautifull winglet! it's on airliners.net as the pict #51112
It's a winglet of an A330 of SABENA at Brussels national (Belgium)
(all the SABENA's Airbus have that winglet!
This plane is not an A340 but the A340 and the A330 have the same wing so...)
I hope u will enjoy this pict!