Where to buy extra AC plug adapter for USA?

Got the Beryl and it came in the box with an AC adapter and two ‘screw in’ adapters. One for euro plug, and UK plug. Nice to switch. Where could I get an extra screw in plug for USA socket style?


Are you in the EU? Check this one

Since it is (yay!) USB-C, you could consider any 3 amp/5V brick. No PD though. I did get the adapter suggested by @alzhao alzhao as well.