They have the records for every Lutheran church in the entire Kingdom of
Hannover up to the 1850's and later records for the churches in their own
district. I don't know where those towns you mentioned are, though, or the time
period of interest. The archive has a website - I think you can find it on
cyndislist - Germany. Or check out the compilation of archives by Andreas Hanacek.
If you're desperate, I can look it up in my Germany box.
John V. Heyse