Sorry I misunderstood the question. I'm not sure now what you are looking for. With the SA series of this generation: You purchase the hardware You purchase a permanent license fo the number of concurrent connected users (these never expire) You purchase a support contract that gives you access to firmware upgrades; hardware support tickets; hardware replaceemnt for failures; these are for terms of 1, 3 or 5 years at a time Per your list some of the devices are now end of support, meaning you can no longer purchase the support contract and new firmware is no longer developed. Your only option is to keep running them as they are. For the supported devices you can open a Customer care case to ask if there is a current support contract on the device and get the account updated to your information if it is in place. If there is no contract you contact a reseller as I mentioned above and go through the process to reinstate support for the device.
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