BiblioVault may have an electronic file which would meet your requirements for this title:
Seneca: Fifty Letters of a Roman Stoic
Lucius Annaeus Seneca, Margaret Graver, A. A. Long, Margaret Graver, A. A. Long, Margaret Graver and A. A. Long
Paper: 978-0-226-78293-5
Cloth: 978-0-226-78276-8
Electronic: 978-0-226-78309-3