Does anyone know where I can get an inexpensive 12VDC to 48VDC converter to power one of my Z3801A's? I can find 12VDC to 24VDC units, like this one at Jameco: http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=212514 Thanks.