A small harmony patch that will allow you to include the merchant in your save... well, if you suddenly change your mind about playing without him. Just put it in your mods folder, then launch a game and join your save, radio will be spawned.

Enabling this mod will have irreversible consequences. The trader's state cannot be restored even after the mod is deleted.(Maybe ill fix it, or you can use precompiled version of disabletraderinexistsave.dll with the same function, but traderstate will be force override to FALSE)