Hellow my friend,
I'm new on this forum, and i was looking foor the same ting as you are. I found the exact mounts as in the lowest image.
Here's the link : http://www.cotytech.com/content-categories/cat-191/monitor_mounts.html
I dont know if they work for your monitor but at least you can investigate it more now !
I hope i've helped you,
Dread