Help. Searching Firmware for Ecdream CS918G Plus (AMLogic S805 RTL8723 Ethernet Bluetooth)

[SnakeKing]

Please, help. Can't find correct/stock firmware for Ecdream CS918G Plus
CPU: AMLogic S805
WiFi: Realtek 8723BS
Ethernet/Bluetooth
PCB: L-form, KCA-002 Ver 1.1 2015-04-09

Stock firmware was KOT49H.20150831:user/test-keys 4.4.2/3.10.33 root@ec-desktop #3. After few reboots Google market started to crash and i tried to enter recovery but found that pressing recovery just did hard reset (that was two times) and after second time clean system started to crash gapps etc. Then i tried to find correct good firmware but with no luck. Then there was a lot of killed hours and hours.
What i did: tried ~20 firmwares from MXQ, S85, S805, PFD_s805, EC-MK808B and even found one fw for CS918G Plus (CS918G Plus 4.4.2 KOT49H/20150324 test-keys 3.10.33/20150323) but they all are pain. Most of them didn't recognize wifi/bt chips, some of them even didn't have bluetooth option, some of them haven't ehernet, most of them are 720p, part of them can't failed Antutu and CS918G Plus KOT49H/20150324 showed ~50% of score from other firmwares i tried.
TWRP that i can install on part of that firmwares is MXQ_S805_TWRP_2.8.7.0

Please, if you have good current firmware for that device (with 1980 resolution? working wifi/bt/eth0/sd/usb's) - share it, please.

Thank you very much!

[SnakeKing]

It's dead. Possible NAND death. USB Burning tool don't writes anymore. Tried short USB cable - when starting to format always shows disk error at 4% and timeout: [0x30201004]UBOOT/Disk initialize/

Send command/Error result