Just a thought or two
Is it worth the investment to purchase ten Marti reports. One for each possible iteration of the VIN. Would the visible clues on the shell possibly assist with matching the shell to a report. I.E. colour or date codes on sheetmetal?
Also, and I don’t know how you would go about it, can you get the metal scanned in some way? I am thinking I have seen people discover hidden stampings (due to damage) with some sort of scan