U will get that from Mr. Papu Merc Mechanic who has a shop on Peshawar road/mall road, its on left side of the road while U are going from Daewoo stop to Sadar, dont remember the exact name of the place, he also opened a show room with Benz Club which is visible from the road.
I have seen few 6 cyl engines with transmission, in his warehouse & few 240Dz as well!