[ImEvil1]

In the past, we have used the crash incidents to determine unit numbers. Since your car was more than likely in-service still when the first few occurred, there would have been crash reports generated, and the license number (unit number) noted on the incident report. The DHSMV number assigned to each incident is what we used to look them up. I heard, in the past, the records had been moved to long term storage, but also heard someone else was able to get a report pulled not too long ago. Good luck either way.