Was this 1969 vintage Lear required to have a CVR and FDR?
IIRC, part 91(whatever appendix pertains to large and turbine aircraft) requires two crew turbine powered aircraft with 6 or more pax seats to have a CVR. FDR only required for 10 or more pax seats aircraft. So it seems likely to me that this Lear was probably equipped with a CVR.
If the news stories description the wreck site is anything resembling reality then a CVR with recoverable audio might be a real lucky find.