The Warren County Register of Deeds office has birth records from 1914 to present, so a birth certificate from 1894 is probably not going to be available, though you might ask them if they have older birth registers pre-1914. You'll need to get creative. Does Warren County have old school census records? Some if not all Kentucky counties kept a census of all school-age children, and their actual birth dates were recorded there, certified by their parents or guardians. If Warren County NC had school census, perhaps the clerk would certify a birth record for you based on those census records.