Here is a caution for you. If this is a hurry job and you pay for fedex or
UPS you will pay duty and fees on the replacement as well as whatever you might have paid for the original screwup. Even though you send back the original, unless the invoice for the replacement is marked as a REPAIR, it will be proceessed as a new entry with duty owed. This happened to me last year and I fought to no avail. If you go by mail there's no guarantee you'll get it on time, but a better chance you won't pay duties.