Not sure if there was clean one ...
But i have seen clean one somewhere inside goblin camp (they probably didnt paint it yet
) ... if im not misstaken it was somewhere close to Minthara.
Also, if i may suggest ...
There is several cool shields for Druid ...
Personaly i prefer either wood woad shield ... or that one from Kuo-Toa, that looks especialy good. ^_^