FWIW: Alpa has an excellent guide on their website (members only) that describes various carriers jumpseat policies in detail. It's under the committees (jumpseat committee) tab.
It's a great resource. Phone numbers, dress codes, how to list, how early to show up, how many jumpseaters they'll carry, etc. There's even a link to FedEx flights/jumpseat links so you can figure out their route structure and how to list.