I read the dell Server PSU are the best.
To clarify, I have 400Amps, There's more than enough juice to run 100,000watts.
Is it hard to convert the 750W Dell PSU to run S1s?
https://bitcointalk.org/index.php?topic=503423.0You can buy just the breakout boards or the whole kit with everything. I have one of these and it works great.
I hand soldered the main terminals on mine and made up some links and resistor packs with jumper cables for the control pins.
In quantity I could probably do them in 10 mins a PSU.
They are loud though.
Good Luck