Question what is the name of this type of power lead?

Common barrel jack. Comes in various sizes.

All you really need is the voltage and whether the outside of the jack is ground or the opposite. Observe the labels: https://img2.jpegbay.com/gallery/006854130/2_f.jpg

The little diagram shows you which part is positive and which is negative/ground

You may even have several power supplies laying around that are compatible.

Or you can buy universal ones:

https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Electronics/dp/B01N7RS0NG

Or ones with multiple connector sizes:

https://www.amazon.com/Compatible-PT-400AD-PT-400VP-PT-600VP-UU324-1220/dp/B07P41SJFJ