I'm currently working on two projects at the moment. One on the Hawker Hector and one on the Hawker Hardy. One of the major problems with these projects is finding suitable photos I can use. I have maybe half a dozen photos of each aircraft but I need around 35-40 photos of these two aircraft.

Are there many websites that offer photos for publications? I know of the IWM, RAF Museum, WW2images and AJ Jackson. Any more out there?