Looking for info Alexander BECKETT b ca 1812 Scotland

Alexander M. Beckett, of Scotland, was in New Brunswick by 1832 when he married Rachel Belyea.He died 1859, age 47 & was buried in Eastport, ME.
According to a son's marriage record, Alexander was from Glasgow, Scotland.
I'd like to find his birth/baptism date, place, (if not Glasgow), and parents.