Here is an update.
The company sent a replacement package of 1L e-juice. I had to split shipping costs with them on the second shipment. It sailed through Chicago customs in three days this time. The original package is still sitting there.
I'm going to assume it's been seized or ended up in the DLO. If I'm wrong, I'll get a free liter one of these days. This is 36mg that I intend to cut down to 18.