Church records for Mohrin and Butterfelde

Are there church records available for Mohrin now in Poland, but very near the German border? Our 2-great grandfather was Wilhelm Freier or Freyer born 1830 from an embarkation record for him. His USA marriage certificate lists his father as Wilhelm Freyer and mother as A.C. Buslk (sic). He settled in the town of Belgium, Wisconsin and later lived in Port Washington, Ozaukee County, Wisconsin.
Appreciate any information to locate Mohrin church records from the early 1800’s.

Daryl & Bonnie Wunrow
Wisconsin USA