Attach an external camera to TC55 OTG, any tests?

A partner hasĀ  developed an application that uses an external camera directly attached to the TC55 usb port (on the go). They tried logitech and had some results but the android drivers where available on a trial basis and expired after some time.

Has anyone come across external camera drivers for Android that would allow the TC to "see" a usb camera attached to its port?