just like the SW one but for D&DM

There are a few of the maps on the Wizards Site

Also if you dowload the DDM pack (there used to be one for SW as well) for the Online Game engine Vassal, it has most if not all of the older maps.
You should be able to just download the Zip of the mod and or the DM_1.14.4.Mod, with out vassel and just search around in it for the image files of the maps, i think it should contain most of them, (it used to not sure if it still does)

http://www.vassalengine.org/community/i ... page=Files

I just tested it to see what it has in it, and if you down load the Mod file,
open it with Winzip (or what ever Zip opener you use, there are 14 maps in jpg form in it that are what are used in the minis game.
There is a second Zip which is for "epic" maps (ie very high point games) that i think has the rest of the maps.
There should be a SW as well, just not sure of the link for it.

Hope that helps.