Kev, I think the North Afrika Hurricanes were armed, because that was all that was available at the moment. I cant say for certainty on the others, I'm thinking I read something about a few armed P-38s or P-51 early on before they made dedicated recon models.
I think these would be almost as easy to add as the Spitfires, copy the models, delete specs on guns (weight, drag, etc) and then add camera specs. Even if they added a camera option for Spitfires dont you think they would have to tweaked the model settings for the extra 100 or so pounds of camera equipment?