The LDS have this film in their catalogue - Andy means his transcriptions only go so far.

You can get this film in through your nearest family history centre, if you cannot get to Edinburgh.
Durness Parish Registers
Microfilm of O.P.R. ms. no. 48 in the New Register House, Edinburgh.
Contents: v. 1. Baptisms, 1764-1820, marriages, 1765-1820.--v. 2. Baptisms, 1820-1846, marriages, 1820-1854.
ChristineR