When reader Brandon reached out to Nintendo customer service to ask about the 3DS XL charging cradle coming stateside, here's what the rep said.
Thank you for your email. I am sorry to inform you that we have not announced a Charging Cradle for the Nintendo 3DS XL.
Looks like you'll have to import it for now. I wouldn't give up hope, though. You never know what Nintendo will do in the future.
Source:
http://www.gonintendo.com/?mode=viewstory&id=183570