you can download http://www.filefront.com/15667583/patch-3.rar and extract it into your data folder.
I m not sure if it s working because I cannot test it, but normally both cat/bear should use the black skin.
To change the color of the bear go to DruidBear folder and rename DruidBearSkinXcolor.blp into DruidBearSkin.blp.
For the catform i'm not so sure, but perhaps you need to rename DruiCatSkinXcolor.blp into DruidCatSkinBlack.blp. It's in the DRUIDCAT folder.
When you rename be careful because it's case sensitive so don't mistype.