I have built my own unit and it works pretty well. I would like to improve it to a pin registered system in the future.
Basically I used a Point Grey Grashopper Express 2.8Megapixel machine vision camera which can do 24fps at 1080P resolution.
I use Frank Vine's LED lighting system that gives high intensity white balances flashes @ 24fps, and a simple ($10) hall effect circuit to know when the frame is in the gate ready to image.
A reversed enlarger lens forms the imaging system and projects directly onto the chip of the camera.
This allows a full speed transfer with a high bit depth in real time. All up cost was about $3000, the camera being the expensive bit @ $2000.