Pulley System

I'm not trying to jump the gun here. But I'm going to be looking at a 1972 scamp that a member here told me about. I'm waiting to hear from them. I don't know if it's a V/8 yet. I do know that it's a non ac car and I'm going to have a ac system installed on it and I was wondering where I can get the necessary pulleys and what they would cost. I have the price for a aftermarket system, but I can't find the factory style pulleys. I'm wanting this information to help me with bargaining on the asking price of the car. Going by the photos it looks real clean.