Ebay has been a disappointment. Fairly constant vigilence has not led to me finding the maps (or the entire series of modules with maps).
WotC Map Galleries would be a fine idea if not for the cost. If I had access to a giant commercial printer that could handle oversize materials, it might make sense. But, without such access, printing at a print shop would be prohibitly expensive. Also, most of the adventures never seemed to make it to the map gallery. Only 3 of the 9 did.