Contact Info Needed for Vangelis Associates on Unreleased Project

Does anybody know how to get in contact with Lefteris Zermas For an article I am writing about an artist, I am looking to contact Vangelis' assistant Lefteris Zermas. I wanted to know the progress on some unreleased project. Anybody have any idea how I could get in contact with him? Already tried via IG, but no luck there. Same goes for the engineer of the last album, Philippe Colonna. Not found any lead on him.