Default [Q] Help on put ACER A1-830 back to original rom

Hi all Android Gurus,

I have successfully rooted my ACER A1-830 as explained on this thread.

Model: A1-830
Android Version: 4.2.2
Image Version: Acer_AV052_A1-830_RV07RC05_WW_GEN1
Compilation Nš: Acer_AV052_A1-830-1.014.00_WW_GEN1

Now I'm facing some problem with the Micro-USB port and I need to send it back to warranty an I didn't make any backup of the original rom.

Does anyone knows where can I download the original rom and how to flash it back?
Can anyone can help me on this?

Best regards,
Jhonnie