The BLMS 1590C /1590BBT enclosure is here. It comes with 4 screws. It's diecast aluminum. It's shrinkwrapped. It's AWESOME. And it's for sale cheaper than anyone else has it.
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.
The internet isn't in complete agreement on what the 1590C official size is so you should check my measurements just to make sure we're talkin' 'bout the same thing.
It measures 120 x 94.5 x 50mm / 4.72 x 3.72 x 2.22"