I have several Harley Benton Powerplant Jr units and have found them to be quiet and reliable. Each output only provides 120 mA though so you would maybe need a couple of them. In fact, the new Harley Benton ISO-2 would probably be a better choice and it's only €68.
www.thomann.de/gb/harley_benton_powerplant_junior.htm
www.thomann.de/gb/harley_benton_powerpl ... e3338451f1