Some of the Taiwanese manufacturers do make OpenPOWER machines. However, the pricing is in the same ballpark as Talos™ and you don't get anywhere near the comp

Some of the Taiwanese manufacturers do make OpenPOWER machines. However, the pricing is in the same ballpark as Talos™ and you don't get anywhere near the complete owner control that Talos™ offers. Look into the closed-source BMC on those machines, and also the built-in peripherals that require third-party closed firmware and, in some cases, closed drivers to run.