Where to buy
Hi Peter. Are you in communication in official Tasmota support portal for device?
You can find ours on Balakadder preflashed section
There is no support for the modified incompatible Athom Tasmota version from the Tasmota crew.
Athom Tasmota is modified from official Tasmota repository? Without official support.
Athom Tasmota version is not supported from Tasmota crew.
The Athom Tasmota version can not be upgraded to original Tasmota version without a big chance to brick the device. Athom did changes which breaks compability with original version.
Tasmota is in no way related to Athom. Since Tasmota is Open Source everyone can use it, if the code and the changes made are available.