I would agree, there's no cheap way to do this, though the launcher isn't the really expensive part of Patriot. It would probably be possible to strip the key components from a launcher to build a more covert 1 or 2 cell launcher specifically for the purpose of ambushing aircraft that think they are outside the Patriot's envelope. I would be surprised if this idea hasn't been worked on, even if only on paper.
Very unfortunate.
Dagestan rebellion underway?
Hahaha. Hohoho.