PRUSA Wine
Benoît France’s Carte des Vin. This is an entire series covering French wine regions–including a detailed map on La Vallée de la Marne.
Unfortunately, these maps are mostly only available in France. However, I was able to buy several when I lived in the US through Amazon for around $11-13 each. You will still need to pay international shipping. But buying multiples at once helps offset that a little.
Hugh Johnson and Jancis Robinson’s World Atlas of Wine is always a reliable resource. It will list many of the villages and show topographical details. The only negative is that it doesn’t highlight the 17 subregions within Champagne.
If you can find this bottle (or the 2004/2005), it’s well worth the $145-165. This is a delicious and well-made prestige cuvee. But for more current releases (like the 2009 and 2011) I might be hesitant about opening it for something like New Years.