What is the cost of head light dome for pulsar 150 cc

I think u can replace it by 220's headlight and any bajaj authorised service center can do this job but just to tell u that the 220's headlight works out well in terms of design because it goes well with the fairing on the tank. If u try to put it on 150 then probably it would not go with the tank of 150 in terms of flowlines and it will also look big and bulky.Do remember that the headlight assembly unit of 220 have a different wiring mechanism as the headlight comes with a Xenon projected lamps. U will have to change the wiring system of your 150 by 220's one and will cost u big bucks. But if money is not a constraint for u then u can always go ahead and do this job on your bike.