Dear Carolyn,
Microfilms you can find :
https://familysearch.org/eng/library/fhlcatalog/supermainfra...but you need to put the name of the parish not just village. By the way in XVIII and XIX centuries the name "Rumunki" had the meaning that it was just few houses which just started the new village. So you could find Rumunki Czarne (currently the name is Czarne) in parish Wielgie and many, many others. Just few of them remain till today with the name started with Rumunki.
Anyway - for Gozdowo parish
1808-1825 births, deaths, marriages - microfilm 730094
1826-1842 births, deaths, marriages - microfilm 730095
1843-1856 births, deaths, marriages - microfilm 730096
1857-1865 births, deaths, marriages - microfilm 730097
1866 births, deaths, marriages - microfilm 1191002 Item 16
1867-1879 births, deaths, marriages - microfilm 1191003
1880-1884 births, deaths, marriages - microfilm 1733682 Items 12-16
For the begining I think it is enough :)
Happy hunting :) Bogdan