The nice CC image search engine is HERE. That might help but I'm not too hopeful. I'll have to do a write up on that site, simple image search engine.
Have you looked at Tarheel Reader? You can download ppts there and scoop images.
I've used the pictures in the back of Jill Hadfield's "Communication Games" I use these for assessment purposes. Download this - I think the pictures are in there. Or search in our Media fire resources.
In writing, there is a writing with pictures book - that might help...got to run or I'd search for it....