Here is the last “stack” folder dock icon with the Wood Bin theme. This one is the iLife suite of applications from Apple. In this icon is the iMovie, iPhoto, (even thought I do not use it any more), Garage Band, Photo Booth and iChat icons. These are all Apples icons, I do not claim any ownership of those icons.
If you would like to use this icon for your dock, you can download it here.