If the items you look at are truly 'ClipArt', you should be able to create your own combination of dragons' and doves. Each of the items in ClipArt should be able to be cut and pasted into a new image using standard Windows conventions.
It's not quite what you're looking for, but if you look at the end of Konrad Lorenz' "On Aggression" there's a great picture of a wolf with an olive branch and a dove with a sword. Doves/pigeons are nasty, vicious little bastards.
If you want to use a piece of art as a logo you'd better make sure it's in the public domain or that you have the appropriate rights to it. Otherwise you are courting a nasty lawsuit which you are almost sure to lose. It might be worth it to find an artist and buy or trade for something to your specs.