Since all that was missing was the fire control parts, I went down to Bowers and picked up an ALG Combat Trigger.
The upper did show up last Monday. Took right at three weeks from order to arrival. Not bad. Appears to be OK and just as ordered.
All I lack now is a BCG and a charging handle. I'll either order those two items from BCM or maybe just run down to Bowers and pick them up.