There's a couple Branson dealer techs who post in the Branson section of this site (at Century & Branson). One of them might be willing to give you a number.
But even if they do, that may not be what it costs at your local dealers. So it's best to ask them.
Some locations have local independent tractor mechanics. It may be cheaper to have one of them do it (if this is the type of thing they do) instead of the dealer. Or have them remove the axle for you and you can truck that to the dealer rather than hauling the entire tractor.