Ask them to get one for you, they are supposed to get you the part, if they say NO then ask them HOW do you actually put it on the engine in the first place, MAGIC?
Contact a good parts dealer in Lahore, and show them the part - they will have it, Its never called PCV in Pakistan, its called various names.
btw - its very odd that a parts department would say no we dont carry it, they might say that its out of stock or something, but if they say NO - then tell them that you need to speak to the parts desk manager and have them explain that if Suzuki puts this part on the engine, how come you dont sell it, and what are you supposed to do?