I realize this thread is years old, but a company called 'Misumi' is available online, where you can order pulleys that fit your needs. No more need to order a pulley in a stock configuration, then have to machine it. Just order it the way you want it. Total cost is far less and its at your door in about a week. I used them to create two new pulleys for me, for my SX3. They also have a belt calculator, so ordering the right belt is a breeze.