To buy a new pulley ring, it is $69.95 plus shipping per ring. So $50 shipped is a decent deal.
Do you already have a non-stock pulley on your car? If I remember right, you have the stocker still. If you do, then no, this won't just bolt on. You will need the billetflow snout piece.
However, if you wanted and are looking to order parts soon, you could order the whole setup from billetflow, and we could swap rings.
I'll get pics of it tonight...I have pics, but I'll get some current ones.