Searching for a minimal USB camera

[msto]

The tested cameras this year (Axis, Microsoft LifeCam 3000) are much more expensive and have more features (auto focus, color adjustment) than I'd like. I'm currently planning to use one or two cameras for internal monitoring on the robot (to fully understand when things go wrong on field), and those cameras are overkill. (I'm also working on a robotic EDD project that has a very low budget).

Has anyone found, used, or seen a good camera that comes closest to these minimum requirements?

* 320x240 pixels at 10 fps.
* USB interface to an ARM Linux computer (roboRIO or ODROID). Preferably over GenICam interface, since that's already on the roboRIO.
* Does not need to be in color.
* No mounting requirements (a raw PCB is fine).
* Does not need to auto-focus.