BiblioVault may have an electronic file which would meet your requirements for this title:
Letters on Ethics: To Lucilius
Lucius Annaeus Seneca, Margaret Graver, A. A. Long, Margaret Graver, A. A. Long, Margaret Graver and A. A. Long
Paper: 978-0-226-52843-4
Cloth: 978-0-226-26517-9
Electronic: 978-0-226-26520-9