Hi again

I am in need of a birth record for Alexander Fraser in order to continue my grandma's paternal family tree, and was hoping somebody could help with suggestions for finding it!
- I know he married Ann Blackstock at Kirkcolm in 1834.
- The 1841 census he is listed as 48yo shoemaker (born 1793)
- The 1851 census he is listed as 68yo shoemaker (born 1783 in Kirkcolm)
- The 1861 census he is listed as 76yo pauper (born 1785, no birthplace listed)
He died 22nd April 1864 at Stranraer aged 79yo (born 1785). His parents are listed simply as deceased, so no clues there unfortunately!