If you're looking for another alternative, I offer IBM 2880W PSU's with breakout boards and cables, they are being used to power 2x S9's or S7's without any drama.  Plus, if you ever do develop PSU problems, the boards and cables are re-useable.  Shipping PSU's to you from North America would be very expensive, but if you can find a cheap supply of the IBM 2880's (model AA23920L) in your area, send me a PM and we can work out pricing on boards and cables.  I have supplied many mines and data centres with PSU's that are plug & play (unlike some server PSU's that require modification),  my customers have been very pleased with the product.

Good luck