Hi Laura,
Just recently I did a lot of research in the Dörverden, Westen etc area on one of my paternal ancestry lines.
As you probably know the Ev. Luth. church records of Eitzendorf are microfilmed and I would easily have a chance to access those in order to look for the desired records for your ancestors.
Charges, however, would need to be compensated.
So in case you may be interested, please feel free to contact me directly and it would be my pleasure to be of service.
Kind regards,
Vera Nagel, Germany