When I can't find the photo in one of these sources, I do a graphics search restricted to captions. From there I might search the captions for all tools. If I still can't find what I need, I look at the resources I have in Logos. As a last resort I go to Google Images, but really by that time, I'm usually not going to find what I'm looking for.
I can say that normally I find what I need in Accordance thanks to the graphics resources available. However, I'm always in favor of adding more if they're released for Accordance. In my mind, I can't have too many.
I've been meaning to do this for weeks, but I just posted a screencast of the steps I just described at my blog. If you're interested, you can watch it at This Lamp, or you can view it here:
(I recommend viewing it in fullscreen mode)