How about the one shown in this thread:
http://www.xt660.com/showpost.php?p=50341&postcount=24
I think it is called an Acerbis Cyclops, am not 100% sure though!
Is it different looks you are after, or better light? If light, you could go down the route of fitting a HID kit, wich I am in the process of doing now. As seen in this post
http://www.xt660.com/showpost.php?p=61818&postcount=11
In fact, I recommend you read through the mods index here:
http://www.xt660.com/showthread.php?t=630 as it is full of useful info, including those two pages I linked to!
Happy riding
Harry