Here you go.
http://www.mainelectronics.com/acadater.htmMan that is one odd power requirement. Not sure if this will work but it will do 20vDC @ 1.5A
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PSSMV7U
COMPACT SWITCHING POWER SUPPLY 36W WITH SELECTABLE OUTPUT

$ 56.95 Canadian Dollars
This adaptor is a state-of-the-art switching power supply and features some major advantages such as: - cooler running - stabilised output - short-circuit and overload protection
- compact design - very low idling consumption
Features
8 detachable DC plugs for notebook computers & personal digital electronic devices.
stabilized output, low ripple & interference, short-circuit & overload protection, high efficiency & low energy consumption
Specifications
Supply Voltage: 100 ~ 240V AC
Power: 36W
Efficiency: >= 70%
20 selectable outputs: 5 to 24V DC in steps of 1V
(from 4.3 to 1.5A)
output plugs: 2.5mm mono - 3.5mm mono - 1.0x3.0mm 1.35x3.5mm - 1.7x4.0mm - 2.1x5.0mm - 2.5x5.5mm, 1.5x5.5mm.
dimensions: 3.5" x 1.8" x 1.2"
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