Have a friend who recently purchased a Kitfox that had been registered and received an airworthiness inspection through a DAR (~ 10 years ago), however, it was never flown and the builder has unfortunately passed away. The family selling the bird cannot locate the 40 fly off paperwork authorizing Phase 1 that would have bee received from the inspector. What would typically happen in this case? Could the local FSDO recreate, or would there be a copy with the FAA somewhere?