I cant for the life of me find the thread again sorry, but I did find a couple useful links- PC PSU conversion & a good ready made PSU:
http://www.rc-monster.com/forum/show...&highlight=psu
https://www.ssl-stormerhobbies.com/c...pl?pn=RIVRDC30
I think I found the PSU though that was mentioned in the thread:
http://www.amainhobbies.com/product_...C-Power-Supply
Pretty sure thats the one, though its only rated for 252watts in theory. Otherwise, they do have some other options that are nice:
http://www.amainhobbies.com/index.ph...Power-Supplies
I'd go with a PC one converted for r/c use personally, 400watt supplies are pretty cheap, though it depends on the brand I guess.