Just download regular green trolls here:
http://www.hiveworkshop.com/forums/models.php?search=Troll&d=icon&r=200
While you're downloading them, to the left of the download button is a "Click here to display advanced details." click on it.
Then simply replace the skins listed there, with their chaos variants.
For example, this model uses the grunt skin, grom skin, and troll skin:
http://www.hiveworkshop.com/forums/...794/?prev=search=fel%20troll&d=icon&r=200&t=1
So all you have to do is import the chaos grunt skin, the chaos grom skin and this skin:
http://www.hiveworkshop.com/forums/...61253/?prev=search=chaos%20troll&d=icon&r=200
to your map, replacing the original skins.