Need FW for Azpen A746 (A33 Allwinner) 7" Tablet

[XDarkMario]

Hello, i have been trying for a week trying a ton of different firmwares for this tablet and none seem to be it. my original plan was to upgrade it from its normal android 4.4 to android 5 and i have found a great rom that did. But the issue is that the touch is inverted, no sensors work, no wifi, no camera and no sound. i am trying to port the rom correctly but as a backup i need to get the stock FW to fall back on. these are the specs of it.

Model:
(Allwinner A33)
azpen A746
800 x 480 7"
512 mb ram
8Gb nand

board:
Front: Eferco M86_MB v2.0
Back: 05 16 TEAN E120339 RU 94-0ML1
Back sticker: M86-V3.5-8G/8312
SW:MX/XJH/C0B
YHK16-01-0063
SN:330140915007503