Yep, Sager/Clevo. Clevo L141AU has the same specs (2.5 lbs, 14 hours claimed battery life, 65W barrel charger, same keyboard layout, i7-1355U option). The case looks close, maybe identical, to the photos in the article. https://laptopwithlinux.com/product/clevo-l141au/

EDIT: Customized the Laptop with Linux Clevo to the same exact specs as the review unit and got a total price of $1,507, so about the same, give or take $30.