Mitsubishi Lancer 2001

I live in Perth in Australia,

i would like to get an engine put into my 2001 lancer 2dr which only has a 1.5L in it atm.

what should i get that can fit into the engine bay?
where can i get it?
how much would it cost?
where can i get it installed?
how much would that cost?

btw i am pretty much completely car illiterate so plain english would be very much appreciated.

thanks

you can install 2.2 in it.