Power supplies

Who carries a fairly good 18 volt 1.1 Amp AC/DC power adapter for a decent price. Under $30 would be great.

Digikey.

Digi-Key - T956-P5P-ND (Manufacturer - ETS180110UTC-P5P-SZ)

Mouser

WDU18-1400 Triad Magnetics Plug-In AC Adapters

Amazon/ebundle
Amazon.com: Universal AC Adapter 15V 16V 18V 18.5V 19V 19.5V 20V 22V 24V 70W: Electronics

The Digikey one looks solid, it's a switch mode supply so it's regulated, and inexpensive
The Mouser one looks like a common wallwart, unregulated, and expensive

The Amazon one actually looks incredible if it's accurate, at 18V 70watts is 3.8+ amps, and it's variable as well. Cheap too.