Why not look at PSU deals - For example Hungarians were supposed experts at BALCO, Russian experts were all over Bokaro Steel - all of these were paid not in rupees or roubles but dollars during their sojourn in India. NEedless to say, the bosses of these PSUs made countless trips to the USSR and almsot alway sdetoured via Europe.
As for Soviet equipment - look a the miserable MIG21 - known as the flying coffin -that was inflicted on the IAF -nothing furtner needs to be said
