Buy Video Surveillance Gadgets

We are looking to source a variety of surveillance cameras. We are NOT interested in the normal, large CCTV cameras. We are looking for a more subtle type of recording equipment. For example we are trying to source a low cost PIR sensor-activated security camera which takes photos when someone moves past. We are also interested in hidden or very portable cameras which are built into something like an item of clothing such a hat or sunglasses for recording covertly or for recording sports / activities from a first person perspective. An important criteria is for these to be battery powered.