Mitsubishi DiaQueen SP III is the OEM ATF for this car. You should be able to get it from Khan Motors or ZAFCOM Lubricants both on Korangi Road, defence
Change interval for this oil is 40,000km's. I got this for 1400rs for a litre bottle in Lahore, total of 10 litres bought for a flush. But only after I ran the ZIC far more then I should have. Or you could opt to buy the ZIC version which equivalent of the OEM oil but half the price. Change it every 20k km's. Order ZIC only online.