Jonathon Duerig (I believe he took over much from Daniel Reetz) responded that we have a 'hackerspace' model scanner and offered some advice. I asked if we could buy the "lighting system" parts of a 'quill' model and if it would be feasible to mount on our 'hackerspace' model. The logic is well put here http://diybookscanner.org/archivist/index322f.html?page_id=459
beginning with the sentence "Lighting for scanners is incredibly difficult to do right. "