I had to look that one up, but it seems that a PSL or .308 Saiga would be a more practical marksman's rifle, but, slap a scope on a 7.62x39 RPK and you've basically got one better again. . . . to get as close as physically possible I'd do a Saiga long barreld 7.62x39 and put an RPK bipod, psl styled wood (from battlerifleG3 here on G&G) and side mounted optics.
Is that sort of what you are looking for? or more like a Tabuk kit?