Desktop image of Beastie

[Fbsd1]

I picked up this jpg of Beastie over 10 years ago. Tried using
it for a gdm logon screen background, but it's really light.

           http://www.a1poweruser.com/beastie.JPG

Does any one know where i can get a darker version of this image?
I tried to use gimp to make the image darker, but had no luck due to my 
       lack of understanding of what I was doing.

I sure appreciate you help. Thanks