I did a quick search, and the third post had this:
"i bought a 6pin pcie power plug from Fry's for 3.99 and connected that to my 2nd CD-rom drive power. (i'm looking to get the actually apple cord that connects directly to the motherboard). but for the time being it works great."
Hope that's what you were lookin' for. Fry's is online at outpost.com, btw.