ITE certified 10 to 30-watt switchers come with 2-inch width

TDK-LAMBDA ZWS10-30B Series of open-frame, 2-inch wide power supplies come with output power ratings of 10, 15, and 30-watts. The high-density, high efficiency, low profile units use design techniques to combine high efficiency and power density. Product consumes less than 0.5W under no-load conditions (0.2W typical) and delivers a narrow width of 2 inches and a low profile of 1 inch or less depending on the output rating.

http://www.us.tdk-lambda.com/lp