My new (not very large, only 4 x 104 hp) custom powered case was built by Uryan Modular, a small business that happens to be operating in my country. The prices are pretty friendly, the build quality is great. They use Meanwell PSUs with plenty of reserve power. One example for a larger case (17U/168 hp, 160 module slots, 4 x 2800 mA +12v, 4 x 500 mA -12v):

-- aphew_goodman

Damn, that's a big honker! That price is right, though...840 in 3U and 336 in tiles for EUR 1100, with some clearly BEEFED-UP power, is a helluva deal!