I saw a mirrorcover at VMaxx (Germany): http://www.vmaxx.de/en/public/index.php?fz=65
Distributors for outside Germany: http://www.vmaxx.de/en/public/index.php?action=contact
Success!
One of the few(? I never saw another Journey) in
The Hague ("Den Haag")
Netherlands Driving the silver grey 2008 Journey 2.4 SE, it has 21.000 kms now. A real travelling car!