ZH&k Mobile BLITZ sc7731

Can you help me look for stock rom or firmware gor this phone or to somehow make a back up using cwm.
I search thru google but i havent found any.

The phone is a Spreadtrum SC7731g
512 ram / 4gb rom


Here is the Phone Specs

model-ZH&K BLITZ (scx35_sp7731geacuccspecAplus_UUI_ts6_m7_dt_zh_k)
Board-sp7731gea
hardware-sc8830
Android version- 4.4.2
api level-19
bootloader-unknown
Build Id-HYST_TS6_M7_BLITZ_V06_2015_05_22
kernel version- 3.10.17

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