You're talking about the 2T engine? Not a 2TB or 2TG?
If it's just the 2T engine, and you don't want to spend too much money and just want it fixed, then take it to a carby specialist or qualified engine tuner and they should be able to get a repair kit (ie gaskets, jets and other stuff) and rebuild it and tune it back to new for you.
If you want a different carby, then it's a different matter - depending what you're after.