1.5 80bhp to 1.9 130bhp conversion

So i just bought the 1.5dci 80hp and as much as i love the car i could do with a bit more power.
Now i would like to do an engine swap but what do i need to change and can i keep the 5 speed box? Also what can i do to get more power if i can get the 1.9? Are there better turbos and injector kits etc?

Any help is greatly appreciated.

1.5 80bhp to 1.9 130bhp conversion