Ali, build up a rolling chassis..you can find some chassis in pindi..fit it with good original suspension to make it a roller. original engine blocks can be found but will have problems..check the block for cracks for rebuilding it.
regarding the body..start with the tub and bonnet which can be found and the rest may have to built from scratch.
the other bits like lights, switches etc can still be found in pindi. I know of one guy who prepares willys for a living unfortunately i've lost his card.
Either way its a long and slow process (and very fruitful) if you want to get it right..make sure you pair the chassis to the correct type engine e.g GPW or MB etc.
