amost anything 12v ish would work for you. You can buy something as cheap as as this or get something fancier:
http://www.amazon.com/Tenergy-Switching-Adapter-Security-Amplifier/dp/B0026SUMNY/ref=sr_1_1?ie=UTF8&qid=1456178989&sr=8-1&keywords=12+switching+power+supply+banana+plugs
Some of the 50ish power supplies have current and voltage limiting which is nice, but Im not sure if you need that