The replacement is something you would have to purchase. I recommend you get in touch with your sales team for that. I am guessing you are on version 7.0, which is past EOL. My recommendation would be to upgrade the S120 to 7.5, take a backup of the config, and when you get the new appliance, restore the config to the new appliance. A 7.5 config can for the most part be restored to a 7.5 and a 7.6 build. Hope this helps.