Coleman makes one that looks almost exactly like an electric automatic drip coffee maker, except it sits on a camp stove and is powered by the heat from the burner. I've never used one, but I've read a lot of positive comments by those who do. One consistent complaint is that the coffee gets cold quickly, but you would have that problem with any Pyrex pot in the outdoors.
Have you considered an insulated coffee press? We use one for our trips. The 1 liter model by Thermos is good for about four big cups of coffee and it keeps it warm through breakfast.