I very much suspect the answer to this is "upgrade to an eISY"... but just in case.
I've been a *very* happy ISY99 + X10 + Networking modules since ~2009.
Recently I purchased, as a back-up, a 2nd-hand ISY99.
That 2nd-hand unit is working fine... but it is missing the X10 and Networking Modules.
I know those modules are no longer available from the website.
Is there any other way to add those modules to my 2nd-hand ISY99?
I note my original ISY doesn't have an external SD card slot, but the 2nd-hand one does. If my original ISY dies, if I open it up, will I find an SD card inside it, and if yes, can I move that to the 2nd hand ISY to move over the modules and the config?
P.S. I still run an all X10 network and after adding the XTBR High-Power Plug-in X10 Repeater reliability has been very very good. Right now I can't afford to replace all my X10 devices with INSTEON so I can only use an eISY if it is X10 compatible - I have an X10 capable 2412S PLM which is working fine (and a spare!)