The latest version of the SOSLIB is 127. I haven't created a consolidated zip since 122, but you can get the entire package via the Update Center. (Just LOG 901,2 and RUN SOSUPD.)
(For non-Windows installations, you need to use a copy of A-Shell/Windows to get the update, then transfer it from your workstation to your UNIX box by FTP or perhaps Samba.)
I expect to update the SOSUPD utility to work under UNIX shortly (along the same lines as ASHUPD).