Well, it depends on luck if you get all related stuff with auto trany then no problem otherwise just drop the idea of swapping.
For your information, auto trannys of suzuki's are available in shoba peshawar. U have to search the required auto trany in junk yard.
U need to change following things.
A/T gear box (price should not be more than 10k as there is no demand of auto tranys)
A/T ECU (It will definitely cost u not more than 1.5k as no demand of it. M/T ECU is around 7k)
A/T Complete engine Wiring (Will cost u not more than 4k)
A/T Gear Stick (Around 2K)
A/T Speedo Meter (Around 3K)
A/T Cables etc (2k max)
I think total cost should not be more than 16k with complete fiting.
Its an advice that first confirm availability of all stuff before going to purchase anything. Also keep the original M/T stuffs with you.
But still I will recommend U to keep your car M/T.
All the best