Made some progress last night.....
Picked up the new transfer case from junkyard. It came out of an 05 HEMI Jeep Grand Cherokee that had an electrical fire.
Tore the old transfer case out of the XK
Split open the new transfer case to replace both front and rear output seals
...and here she sits until the morning when I pick up the new seals at the dealer
As long as everything goes ok, the XK should be up and running by tomorrow night!