http://www.vicorpower.com/products/configurable/

http://www.amcpower.com/

http://www.amtrade.com/pc_power/dc_to_dc_power_supplies.htm

http://www.vicr.com/products/

http://www.elgar.com/products/Products.htm

http://www.tequipment.net/BKPowerSupplies.html

http://www.testequity.com/categories/DC+Power+Supply/

http://www.power-guide.com/products.php?cat_id=Power+Supplies

http://www.powerstream.com/12-volt.htm

http://www.technologydynamicsinc.com/single_output/index.php