All you have to do is measure the caps and the cross. This question has been asked several times, and I wish I knew the part number... but I do not. I do have a thrower that I'm going to work on...... sometime.... but don't have the cross out where I can measure it. If you don't know how to measure the cross and caps, I can give more detail. If it were me, I'd go set it on the counter at the store, and tell them you need one. Tell them you'll call later or the next day and make sure they have one coming. It takes all of about 30 seconds to measure it, and maybe 10-15 min to find it.
