There are plenty of professional salvage divers in this country more than capable of doing that task.
I know two of them, one was best man at our wedding!
I bet there are pro diving guys on Norfolk who could do it for not much more than $500 also.
The senator should just whip out his credit card and make it happen, turn up on Dolans doorstep with them......after having had the NTSB retrieve the data. Can't trust the ATSB not to screw it up!