If i was you mate id try the headgasket first before thinking about getting new turbo's/engine's just because it was done not long ago dont mean it aint gone again and a gasket is alot cheaper then buying a turbo/engine and will only take a few hours to do and even if it aint that you would have only wasted 30 note's better that than going out buying a new turbo and finding out it still dose it after you fitted that and wasted 400 pounds