Re-purposing a scanner CCD into an analog shift register

How tough would it be to do that? Based on the research I've done so far, That could be one hell of a challenge for a noob like me. Knowing that, is there a part (preferably 8-bit and has lots of inputs/outputs) that would do the same thing for me?

This will be used in a similar fashion as a CCD sensor setup, but light isn't the medium I want to measure

So you want to build an 8 bit resolution analogue delay line ?