That's about all.
With their almost unlimited resources and access to sources of information we can't even imagine they can't find someone familiar with parachute equipment of that era.
"Now, after examining the parachute for about three weeks, the FBI could use more help, Carr said.
"We need to go back to the public. We need someone with knowledge of jumping equipment," Carr said by telephone from Seattle. Investigators hope to learn whether the parachute Cooper was given in 1971 matches the canopy in their possession."
I bet most Freepers could find a knowledgeable source within three weeks without FBI resources.
That is not the game.
The game is the FBI thinks that DB himself will call and verify himself as some kind of expert.
And that a list of ‘experts’ from that time might have had contacts with DB.
There would seem to be reason for them to suspect he is still alive, given this recent uncovering of evidence.
Three minutes ... probably already ID'd and is haggling for a substantial "payment for services".