From what I've seen, they are 330w PSUs.
Might not be enough for what you want.
I can make custom breakout boards, but it's not cost efficient for only 1 PSU.
Starting at 5 PSU, I can usually have something done for around 30$ each board excluding shipping.
In your case, you'd better buy a cheap server PSU and the breakout boards already made for them, like the ones I'm making, or the ones by Gigampz and sidehack.
I ship from Europe, so they might be faster and maybe cheaper than me, it's up to you to check and choose.
Thank you! You have helped me majorly:) I am looking into it now.