Actually the aircraft might not be destroyed. Here is the last sheet I have:
It occurred to me that the other plate and some parts might be for sale by someone else, who I'll have to check with, but for now let's assume this plate is still the only surviving part. Either way, Aero Service Corp is long out of business.
As far as getting the FAA onboard, why should it be a bigger issue than building a data plate P-51? I have all the drawings, and if it passes airworthiness why should it be an issue?
EDIT: The person who might have had parts for this same aircraft recently sold his business, and the new owners won't be available until April 2018. I don't have a contact number either. I am, of course, talking of Jay Wisler at http://www.warbird-parts.com . If memory serves right he had a plate, paperwork, and parts for a 17 that was on the civil registry. I can't remember the serial or registration though.
Thanks,
EJ