Since these are just copies of the Lionel Service documents, you have a few options:
1) Acquire an original set of binders with the service documents (somewhat difficult and expensive)
2) Acquire a compilation:
- Greenberg's Repair and Operating Manual for Lionel Trains, 1945-1969 (Greenberg's Repair and Operating Manuals)
- Complete Service Manual for Lionel Trains - Aurotech / K-Line
- http://www.hslinc.com/dahome/dalionelhome.html ( @John Holtmann 
3) Become a member of the LCCA - they have the whole HSL Library, including the service documents as a part of their digital library.