if its smoking on idle then its the valve stem seals, ifs its under load then its the rings
to be honest if the car is cheap enough and not rotten then you could rebuild the engine cheap enough yourself, or find a 2.0 bottom end, its not that costly if you source parts from outside the isle of man. EuroCarParts, German Swedish French will all deliver to Isle of Man
isle of man is a car heaven for finding rare low mileage cars, i lived there for 2 years and went back there to get my current 16v...there used to be a lovely rallye knocking about when i was there. i still check the classifieds every now & again!!
whereabouts in IoM, i lived in Douglas & Onchan for the 2yrs i was there - but that was nearly 3yr ago!