There are some indications that Kamov was consulted in the initial stages of Project 10, but the exact details of said consultation and the workload distribution is unclear.
And in any case it is hardly relevant, for certain given roles there are only so many possible shapes, there's a reason why all the major medium and heavy attack helos share similar configurations.
PS Arguably Z-19 is also an indigenous design. Z-18 is also a highly updated design.
Then too there is the legions of Chinese rotor UAVs, which boast a plethora of designs - though being of significantly lower weight of course there isn't quite so much penalty with designs departing from the norm.