Oh Man, The car you bought by the name of cultus was origionally released by Suzuki in 1986 by the name of Aminity/Elini/cultus (check the spelling) use yahoo (pics) to find a cute pic of your car 1986 model oooh sorry 2005 model.
Also for your information and sake of record this car either 86 or 05 model is bolt to bolt copy of Pontiec firefly 1982 model (an american car).
So the point is; you can find 1000's of auto gearboxes (also ecu controlled) in shershah (karachi) and bilalgunj (lahore). These gear boxes will be fitted bolt to bolt if the local body is prepared with international specifications.
for further clarification call me on 0333-3187001 (Asif GT)