EOL ScreenOS firmware download?

Hello.

We have a failed Firewall in our HA pair.  We are sourcing a replacement, but we need the ScreenOS to match the primary firewall.

I need to find a copy of  ScreenOS 6.1.0R6.  The model firewall is SSG-550M-SH.  We will update after we can sync the pair.

Anyone have a copy?

Thanks!