Is there a certain kind that works with the hp power supplies. Im thinking about getting this one
HP 1400W Flex Slot Platinum Plus Hot Plug Power Supply Kit
But I need a breakout board.
I'm not sure why you would want to get that. It's over twice as expensive as the PSU's mentioned earlier and you still have to buy the boards and the PCI cables. For an S7, that's overkill.
You could buy two of the PSU kits I mentioned to power two S7's/S9's and still have some money left over.
If you are going to buy that PSU, I would talk with the people who sell it to you. I'm sure they will probably have break-out boards and cables or can point you to someone who does.