help I need firmware for mediatek mt8125

[rivelino]

Good Afternoon form México
I´m new here

I have a tablet Lepan TC802A and I need re-flash a clean firmware
the Android Operating System is corrupted.

this is the Processor & Chipset

Processor Manufacturer MediaTek
Processor Type Cortex A7
Processor Model MT8125
Processor Speed 1.20 GHz
Processor Core Quad-core (4 Core)

Software
Operating System Android 4.2.2 Jelly Bean

I found this procedure for do it
How to Flash/Unbrick any Mediatek Smartphone using SP Flash Tool

Where can I get the ROM / FIRMWARE / SCATTER FILE for this model of tablet (MT8125)

thanks for your help