The only other 1.4L enignes are injection.
But that means you have to also get the same fuel tank, fuel lines and pump as injection runs at a higher fuel pressue than carb. If you keep the carb fuel lines etc they may pop or burst over time.
If I was you, and you want a different engine, I would just buy another car, its a lot cheaper and easier then an engine conversion.
easiest would probably be the C14SE, as found in late nova sri, and early corsa sri, 1.4 multipoint injection, about 82bhp. there is a single point version but that has less power than your current engine.