There's none. The game treats them as different buildings, so if you placed a modded one, you must continue subscribing to it until you start a new one or demolish all their instances.

If I unsubscribe from buildings that I have built then they are demolished in game. Do you know of any way around this?

No more mods of mine have been incorporated since the creation of this list, so yeah.

Hi Rob, Is this updated to latest game version + public test branch?