SOL9057 details the ports/protocols used for network failover. 9.2 used SCTP which no other version uses. So you can't use network failover with 9.2 and any other version.
Also, even if you don't have current support you should be able to install any LTM version that was released while you had support (or possibly even later). See these solutions for details:
SOL9057: Service port and protocol used for BIG-IP network failover
https://support.f5.com/kb/en-us/solutions/public/9000/000/sol9057.html
SOL7727: A service check date that is earlier than the license check date now requires you to relicense the system before upgrading
https://support.f5.com/kb/en-us/solutions/public/7000/700/sol7727.html
Aaron