Peter,
The shop will not charge you an order change (normally $35.00) for the hilt change you are asking about..."BUT...(There's that word again) the change has to be made well in advance. If your order is within 90 days of scheduled (or shipping) date it's a "no" all the way around. My suggestion?? If you want it done...The earlier you call the shop, the better. If it is with a dealer...same scenario. Hope this helps.
Best, Capt. Chris