The Collaborative International Dictionary of English v.0.48:

Exporter \Ex*port"er\, n.
   One who exports; the person who sends goods or commodities to
   a foreign country, in the way of commerce; -- opposed to
   importer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exporter
    n 1: a businessperson who transports goods abroad (for sale)