Floor plans

As a DM, I always hate when I know an upcoming adventure requires floorplans of some type. There are maze generators and the like out there, but a random maze w/rooms can only stand in for a dungeon so many times... and my players seem to groan when the figure out what it is ( so I try to avoid it ). In the past I've used plans for historical castles, the layout from EQ's Mistmoore, and other things, however, now I have a different type of layout I need. With a job and stuff, I no longer havethe time I did when I was a student to make my own layout, figure out what the rooms were, figure out some basic defenses... buidling design is a full time job!

I'm looking for a simple tower floorplan... maybe 4 or 5 stories... you know, the type suitable for a mage that may not be the friendliest sort and is about to sacrifice a good friend of yours if you don't stop said mage ( its trite, I'm so unoriginal )

Does anybody know of a resource that has lots of floorplans for castles/ships/towers/dungeons? I figure there is something out there, but I have horrid luck when I google for such things. What resources do you guys have/use?

if you don't mind an alternative, underground tower, there are some full plans for the maginot line out there...the first option that comes up on a google search is great!

Get the Castles and Keeps product from Darkfuries:

http://www.darkfuries.com/index.shtml

It's excellent stuff.

I use the WotC map-a-week pages and store them in a folder on my hard drive. There are some tower maps from several months ago that look like what you need. Try this link:

http://www.wizards.com/dnd/article.asp?x=dnd/mw/mw20010101x

or if that doesn't work, try:

http://www.wizards.com/dnd/article.asp?x=dnd/mw/mw20010201x

hope those work for ya.