A lot of people on the Wizard’s boards have been asking for Dungeon Magazine to include high resolution maps suitable for printing at scale.
I think the powers that be are listening, because Wizard’s has put out both marked and unmarked maps for the latest issue of Dungeon. And better yet, they aren’t hidden behind the subscription Insider wall…
You can find those here.
A savvy photoshopper can enlarge them to 1″ scale fairly easily, and print them out.