looking for multiple photoresistor pad or board

Looking for a pre-wired pad or board with array of photoresistors (min 6x6 resistors on a min 4x4 in area). I would like to locate the laser light source of my xerox machine as it moves across the scanner bed. I only found descriptions of DIY projects online, but I do not have the skills to try this on my own right now. I feel like there should be a plug and play tool like that out there already. Perhaps my search terms are wrong ("photoresistor array/pad"). Has anyone seen a tool like that before? Any ideas would be super helpful.
Thank you!