Looking for firmware
 

Hi, I'm new to the forum.
I'm looking for the firmware for any of the following players:
Pasen REI-16
Teclast M33 plus
CycoTech Vigor plus
Nationite OS-81 plus

They are all players based on the Teclast M33.
The firmware I believe is based on the Teclast T50 but is modified for use on the M33.

Any help would be appreciated.

Thanks!