Run Forge of Fury, just change things around to suit your campaign...
Or the sunless citadel is always nice. Just change th emonsters and some of the traps. Both take place underground so you won't have any problems there.
Or If you like, there is a book with a multi-armed medussa on the cover (holding scimitars) called Devils and Demons i think. It has three really good dungeons in there you can drop into any campaign