I agree make your own power adapter super easy. I like the model below from Amazon, its UL listed
Journeyman-Pro 2713 30 Amp, 125/250 Volt, NEMA L14-30R, 3P, 4W, Locking Plug Connector, $15.97
Tripp Lite Heavy Duty Computer Power Cord, 15A, 14AWG (NEMA 5-15P to IEC-320-C13), 3-ft. $8.52
3 amps...