Well, its pretty easy and not so good looking but... here it is.
Dartn Sidious:
http://www.brickshelf.com/gallery/TsoAu ... idious.jpg
I love using sleeping Ron's face.

Since it shows no 'chin' I used part of Ron's 'mouth-wrinkles' as the place where the chin 'divides.'
And... you can just ignore Ron's eyebrow... then it will sorta look like a mouth....
Hope you guys like it! And comments please!