It seem to be hard to find the correct one..
Here is a site with lots og inside pictures. Maybe by contact (bottom of the page) could be for any help?http://www.deepsonic.ch/deep/htm/gem_wx2_plus.php
The owner / usermanual for WX2/WX400
is downloadable from the site, but it probably won't help you much..
"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)