1978 Triumph Bonneville T140 Carburetors Cant Find

I am trying to find carburetors for my 1978 Triumph Bonneville T140 and I am having alot of trouble. It was orginally my dads and after sitting for a long time the original carbs are pretty thrashed and cant be rebuilt. I have looked all over and I have read his carburetors were only on his bike for a short time because of epa rules and triumph had to put different carbs on the bike when shipping them to america. I doubt i can find the same carburetors, unless anyone knows where I can find them, Ive been looking for a year eith no luck. I was hoping if someone could tell for sure, if i can attached the original uk carbs to the bike and they would work. I can find the original uk carbs easy. If anyone could help me out i would greatly appreciate it. Thanks.