The complete set of Friedman docs are also included in the NSA FOIA vault at https://archive.org/details/NSA-FOIA-Vault (https://archive.org/compress/NSA-FOIA-Vault to get the entire vault in a single zip). To grab just the Friedman docs and not the rest of the NSA FOIA vault, go to https://archive.org/download/NSA-FOIA-Vault/Friedman%20Documents.7z   -- I should point out that the collected version includes the metadata file, but file names are unchanged and unassociated with human readable titles.

These are the same copies released through the NSA's website, just a bit easier to sort and read. 

Enjoy.