Ok i take no responsiblity for this but i have been reading the forums and may try to flash later and i think this may be what we are looking for'
Here is the download: MEGAUPLOAD - The leading online storage and file delivery service
The forum i got it from is here: Rom Flytouch 3. 3G modelo Android Tab10
you will need to translate it to english.
The instructions for flashing are:
Ensure sd card formatted to FAT32 you can use this tool just click accept at the bottom of the link to download sd formatting tool https://www.sdcard.org/downloads/formatter_3/eula_windows/
1 - Download file to your PC.
2 - Card microSD card readers connect to a PC.
3 - Copy complete the contents from android folder in the root directory of the microSD card.
4 - Insert the microSD card into the tablet ensure the power supply connected.
5 - Press home + Back + Power it will then as you to press buttons for factory reset - release buttons and press home + back again. It will the load files from sd card
6 - The firmware update is performed automatically.
7 - Remove after performing the update files from the SD card
The first boot will take a long time but it will boot.
Like i said, i have no time to flash now and do not recommend flashing untill you have contacted your seller to make sure you can get the original firmware that they sold the tablet with.