The 2.2 petrol engine is the 4Y motor.
Have a look here:
http://www.japparts.com.au/products/Carbies.htmlThey are advertising carburettors for the 4Y engine for $330.
Alternatively, if you don't want new, try around the wreckers. These motors are fairly old now and there
should be a heap of them wrecked with carbies for miles.
It is possible that there is a jap carb and an Aussie one. They produced different carb assemblies for different countries depending on what
emission control standards were required etc. The engines with the emission control crap all over them used a different carby to the standard one as it needed a whole heap more connections to it for things like EGR valves.