Everything is on the project page. https://profimaxblog.ru/wz_fw_flashing/
WZ5005 alt firmware full ver 4.4 (16 downloads)
WZ6012 alt firmware full ver 4.4 (16 downloads)
WZ5005 alt firmware update ver 4.4 (12 downloads)
WZ6012 alt firmware update ver 4.4 (10 downloads)