The 1590B enclosure is here. Nearly similar to the 1290. It comes with 4 screws. It's diecast aluminum. It's shrinkwrapped.
The aluminum machining looks way nicer and more finished than what I used to get from the big suppliers before I started sourcing my own.
There are lots of different enclosures labeled as 1590B on the internet. Make sure you check out the measurements to make sure this is the size you want.
It measures 112 x 61 x 31 mm or 4.4" x 2.4" x 1.2"