Hmm, the “special” thing turns out not to be as easy as I had hoped. There’s a line of dialogue I was hoping to lift for 3PO from the Clone Wars series.
The line is, “…I was once the protocol droid to the chief negotiator for the entire Manakron system.” I was hoping to use a truncated version in place of, “I’m not sure this floor is entirely stable.”

However, the dialogue in Anakin’s room is not isolated to the center channel, and there is a lot of noise on the clip from TCW, leaving me with little to use!