compatible recovery image, e.g. clockwork mod, for inoss i7a and clones

I was looking for a compatible recovery image, e.g. clockwork mod, for a phone. It is a Greek branded turbo-x pi (π) but there are many clones of it out there:

innos i7a (China) main model?

clones:
Rivo Phantom PZ-10 (Pakistan)
Kruger&Matz Soul (KM0409) (Poland)
Impression ImSmart S471 (Russia)
Turbo-x pi (π) (Greece)

The phone has android 4.3 stock rom, and a recovery that provide a backup/restore function that seems to work, but only for the current rom, so there is no way to downgrade 4.4.2 from a 4.3 backup (tested by someone else, so I am not sure).
A so presented on the net compatible recovery image does not work in my case (logo stuck), this one is:
INCOMPATIBLE, can destroy stock recovery image: maxule-cwm-6.0.3.3-fix.img

There is a compatible update (tested to work by someone else) (I guess compatible with all clones, but not sure of course):
RIVO_Phantom_PZ10_V5_emmc_qcn-official+factory+firamwear.rar

-- But the new recovery image does not offer a restore/backup function.

Is there a chance someone with android/cwm sources/dev environment, can port cwm for this one, I will provide the recovery image.
An android sources build environement would be hard for me to prepare.

Stock recovery for 4.3: ......mediafire.com/download/er1u6da7022r6eq/recovery.img
(I could provide image for 4.4.2 also) included in the rom above

without a proper backup/restore solution, update to 4.4.2 is a bit risky, and adb backup/restore seems buggy at first glance here.
what do you think?

thanks