The L-1649G Constellation of the Airline History Museum in Kansas City (actually a converted L-1649H freighter that never really flew for TWA) has been painted in TWA colors with titles for a few years now. The titles used to be "SAC" for "Save-A-Connie", the museum's old name. It has a maximum load of only 12 pax per the FAA and is in excellent condition.
The museum also owns a Martin 404, which I believe also has TWA colors and titles, and a DC-3 in restoration, though it was silver and blue and who knows what colors it might have when finished?
Also, since the ex-TWA overhaul base in Kansas City has all the parts, etc, necessary for renovating the ex-TW MD-80s, why would they postpone conversion? After all, AA now has almost 350 MD-80s, and over 80 of them do not match AA's claim for "more room in coach". They have to adjust them or there could be a false advertising claim against them. They only have to pull a few out at a time, and could do it during the aircraft's C- and D-checks.
Those who fail to learn history are doomed to repeat it in summer school.