This is what I use - (since I am also involved in RC):
Compact and dependable switching DC power supply
Small size: 8.86" x 2.63" x 2.50"
Lightweight: 1.53 lbs.
Powers 2 chargers at the same time
Interfaces with Millennium, Rhino and all DC chargers on the market
Anodized purple case that's well ventilated
Internal fan for cooling
Input: 110 volts AC (with detachable power cord)
Output: 14 volts DC @ 10 amps maximum
Output Overload Protection
In RC, its used to power primarily battery chargers, but its output is between 12-14 volts at 10 Amps...
Also, I am sure that RatShack has one rated at this range as well...