Yes would also say hard to get pics in that category most sites that do it just steal em and thats a slippery road I would not reciommend to go. I have some free pics available at :
http://www.phototakeout.com/ aldo probably not in the category you are looking for, however maybe in the future will add some odd stuff however hard to get good thing unless ya start photoshopping and do the stuff yaself.