I am looking for a map of a keep preferably with a room by room description. Something similar to the one in the Pathfinder "Tower of the Last Baron" module but a bit bigger and made out of stone.

If you can point me to a module or a site, that would be great. I do not mind paying a bit for a decent write up.

Stronghold Builders Guide, old DnD 3.0 has a pretty big list of components, and a nice section of pre-gens too

Not exactly what I was looking for, but a great resource. Thank you.

There are a bunch here.
http://www.bing.com/images/sea...lans&FORM=RESTAB