Finally found sas2flash.efi by digging through all of LSI's downloads.
As of current time, the file still exists in:
Installer_P13_for_UEFI.zip
Installer_P10_for_UEFI.zip
via this search: http://www.lsi.com/Search/Pages/downloads.aspx?k=sas2flash.efi
Installers numbered P8, P9, P11, and P12 have the text file with the quarantine message in place of the .efi file. No good!
Anyway, in case the sas2flash.efi file is removed again in the near future, I've made a copy available here: http://www.mediafire.com/?z66is5rrdui6rc3