first off, its nitrous, not NOS, NOS is a company that produces nitrous kits. Terminology is the first step.
Adil- 03008503373
he can order you a new kit unless there is a used kit in the market, though my friend zain is selling a NOS nitrous kit for 30k in lahore, im not sure how much he'd apreciate me giving his number out in the public so id suggest you to email him, his user id on pakwheels is 'mannerism"
a new kit ranges from 35-40k
if you dont know what you are dealing with then i would suggest you to just stay away from it because it can be dangerous if used incorrectly.