Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
perlātor, ōris, m. [perfero], a bearer, carrier, conveyer (post-class.): litterarum, Symm. Ep. 5, 28: perlatore capto, Amm. 21, 16, 11; August. Ep. 146 et saep.