For anyone interested, I bought one of these Vizia 16A plugs on Takalot:
VIZIA Smart WiFi Power Plug
EDIT: below relates to the round Vizia 16A plugs : VIZIA Smart WiFi Round Plug. The above seems to be the wrong link. These rectangular Vizia plugs can be flashed as is with FTDI adaptor.
This is a Tuya device, and it ships with a WR2 module.
The ESP-02S module is a drop-in replacement for the WR2. Found these on AliExpress (I'm impressed with SAPO! Only 2 months to the day! Based on past experience, my expectations were low):
TYWE2S (ESP-02S) serial WiFi module
I flashed Tasmota on the ESP module, and after some careful soldering - figured out that these settings seem to work:
{"NAME":"Vizia 16A","GPIO":[0,320,0,32,224,2656,0,0,0,2720,2624,0,0,0],"FLAG":0,"BASE":1}
I quite like these plugs compared to clunky Sonoff Pow extention cords.