Maybe this will shed some light on the Ka-58?
http://www.5chr.freeserve.co.uk/hkn074.htm
"2. Another big suprise from Russia is that Zvezda have launched a 1:72 kit of a Kamov Ka-58 ‘Black Ghost‘, #7232. Never heard of a Ka-58? Perhaps the answer comes in the small-print down the left side of the box, where you will find the words ‘syerya nyeizvyestnay Kamov‘, which roughly translates into ‘imaginary Kamov series‘."
http://www.aviation.ru/Ka/
"Ka-58 "Black Ghost" - just a toy.
Cool looking 1:72 plastic modelling kit by "Zvezda". Please note, all the features of the model were agreed by the Kamov OKB and Federal Security Service (as published by MK)."