Well the good news came in and with the transmission torn down the initial diagnoses is not as bad as it sounds. It wasn't a catastrophic failure. It's just old.
The particles and burned fluid were just from several bands and clutches finally giving out and not due to prolonged damage on other components. The pump itself is just worn and is being replaced entirely. More major components like the torque converter and planetary are fine. The parts are already in the city so I again authorized for the full rebuild to proceed and hopefully it will be ready before Friday.