Exclamation [Q] Recovery for Maxx 3g AX51 - any one port recovery for this device.

Plz any one port custom recovery for Maxx 3g AX51,

partition ext4, MT6572 processor ,resolution 480x854, Android 4.2.2, plz any developer response my problem.

If recovery not port then , plz give me backup rom procedure ,and flash procedure.

when i take backup with onandroid or mtk tool, its create system.ext4.tar which is unflashable, i want in .img format.

Also It has fastboot not able to flash any other device recovery gives error,
--> partition 'recovery' not support flash <-- why plz reply any developer.