there are a few ex uk mil gazelle already in the us fury helicopters have some which the use for displays
i believe they are all on experimental cats like the uk permit to fly
there are also 341g gazelles civvy and some 342,s which can be used for pt as they are full certificate aircraft they are on the german,american,italian,hungarian,yugoslavian,and the uk registers ,that i know about there are possibly lots more
the uk ex mils use the 3n2 engine which has never been civvy certified
spares can be short but a brilliant aircraft to fly
the flying chicken leg