Mr. Bill,
All the rebuilt alternators I ever bought did not come with a pulley. I guess because some came with two grooves and some with one groove for the belts. I usually took the old one with me and Autozone or Advanced Auto would switch the pulley. No extra charge. They cost about $95-$100 with lifetime warranty and you don't need to keep your receipt. They keep a record on computer. So if you buy one Ky. and it goes out in Tn. the store there will give you a new one. This happened to me. Very friendly people.
Bill Lewallen Lexington,Ky. Where diesels purr and turbos whine.