The main point is to find one that has the correct end on it that matches the power brick. Looks like a C7 (non-polarized) given that both sides are round, and a polarized NEMA 1-15 on the other end.

All different lengths available depending on what suits the situation:

3-ft https://www.amazon.com/Monoprice-18AWG-Power-Polarized-IEC-320-C7/dp/B009GUZ654/

6-ft https://www.amazon.com/Cables-27398-Non-Polarized-IEC320C7-Compliant/dp/B0002J26K6/

12-ft https://www.amazon.com/AmazonBasics-Replacement-Power-Cable-PS4-Xbox/dp/B078N4DS8D/