Final follow up:
AT Pro arrived on Friday, as promised.
Works like new (which it essentially is -- new board and new case). The new case included new connectors.
There were new mounting screws for the head and a new mounting bolt/nut for the coil.(Which is great, since I just bought myself a birthday present --the 5 x 8 coil-- so I can have a separate bolt for each.)

As usual, Garrett customer service was great (though I was kinda' hoping for a free hat! ).