Thanks. For anyone looking for it, that arm seems to be out of stock or discontinued, and perhaps only offered in the U.K. and Australia.

Google helped me out in showing this Vivo model, which looks like it could be the same arm, but with a much shorter pole. “VIVO Premium Aluminum Full Motion Single Monitor Desk Mount Stand with Lift Engine Arm, Fits Screens up to 32 inches, STAND-V101BB”

Here’s an Eletab dual arm model that looks to be the exact same line as the Putorsen. But it’s out of stock, too.