Hi Gang,

If you need a quality, 12V, 20 Amp power supply (or a second one ;-) you may want to try my friends at sin city jets. This is a good company, with very good customer service and low prices. .... I would say that even if they were not my flying buddies in LV.  ;-)

 http://www.sincityjets.com/store-batteries.htm

They have an excellent 12V, 20 Amp power supply for around $75. It is way cool, with two cooling fans and blue lights inside showing through the lightning holes in the metal case. This is a very light unit that is also small in size. It comes with THREE sets of female banana plugs mounted to the case so you can plug in THREE chargers at once! Perfect for our ECL use. It is in the "Accessories" section.  .... And, if you have some extra $$$$$ laying around, they also have some great deals on jet turbine setups. 

PS: I am a big fan of buying extra chargers, (I use three). They are cheaper than extra batteries, speed up the charging process, and are very convenient! 

Regards,