It needs a power source that supports the USB PD3.0 standard, and that can provide a minimum of 12v. In principle, a big USB powerbank of the right size would work (that's how my TS80P gets used for field work when I'm not in the workshop at work), but of course battery life is limited.

There are plenty of USB PD-capable mains power supplies. I presume you're looking for something on Amazon.com, so perhaps you might want to try:

https://www.amazon.com/Baseus-Charging-Extender-Compatible-Included/dp/B09HBJ1Z96/

which has the advantage of including a suitably chunky USB cable, and being on its own mains lead (rather than a wall-wart) which often helps in terms of cable length.

If it's a bit more price-sensitive than that, then:

https://www.amazon.com/Adapter-Charger-WEGWANG-Automatically-Compatible/dp/B07KXGXBL6/

would work, but it's a captive cable / wall-wart design and wouldn't necessarily be my first choice.