If you are still interested in finding this image send me an imail. I often enjoy roaming the web looking for and at images. Looking for your image might be fun and helpful to me.
Also how long ago did you find the image? Keep in mind that sometimes an image is removed. A problem I have come across too often when in your shoes.
Another tip I find helps me out, dont use google alone. Try yahoo and some of the other search engines out there. Each seems to present different results so this can be helpful.