The 1590LB enclosure is here. It comes with 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 called the 1590LB on the internet. Please check my measurements to make sure this is the size you want.
It measures 50.5 x 50.5 x 31 mm or 2" x 2" x 1.2"