I have a set of holiday maps, if he wouldn't mind those. Just remind him the holiday stuff won't be up for your trip. And there might be fewer construction walls at DCA. So they won't be perfect, but they will be MUCH more fun than printing maps out from the website.
If he'd like those, send me your address by PM, OK? And then try to "pay it forward" by sending out maps to others when you get back!