Dell WD19S USB C Dock
Under a year old, was working well but have now replaced it with a thunderbolt dock (otherwise limited to one display on Mac π ).
Seems to be this model: https://www.pbtech.co.nz/product/NBDDEL5145746/Dell-WD19S-USB-C-Single-4K-Docking-Station-with-13
$50 + $9 shipping, or pickup in Papakura, Auckland.