PCI-e power supply?
 

http://www.thermaltakeusa.com/produc...0099/w0099.asp

I have one of these 2x 250w @25 amp power supplies that I never used in my PC because it was just too loud, but I am curious as to whether I can use it for my charger. How would I go about adapting the PCI-e plugs from 6 leads (3 x +12v/3 x common)to 2 leads?

Plenty of how-to convert a computer PSU to a bench type PSU on the internet, here's one:

http://sites.google.com/site/tjinguy.../convert-pc-ps

That's not the ordinary type PC power supply obviously. You're prob going to have to figure this out on your own. My first thought would be they need to be paralleled....would require a little soldering to rig something up.

How handy are you? Don't think you'e going to find something ready made....