There are currently two adventures for the GURPS Dungeon Fantasy line that would work well with the Dungeon Fantasy RPG:
http://www.warehouse23.com/products/...the-fire-demon
A long, in-depth adventure with lots of interesting NPCs and monsters.
http://www.warehouse23.com/products/...goda-of-worlds
A slightly shorter, "drop-in" adventures. However, note that you'll either need
one additional monster book to cover the beasts that aren't in the DF RPG, or you can just swap out their entries on the wandering monster table for critters from the box set.