What's wrong with using a regular camera? A webcam type of device would be the easiest route, but the quality of the images will be on the "average" side depending on which one you go with.
Also, I found the link below a while back if that helps.
Photosimile 200 - Light box product photography system. Mini photography studio featuring professional lighting and photo software for in-house product photograhy.
The Photosimile stuff is real expensive, but could be worth it depending on your Dad's business needs.