John, may I suggest something like the Q-Modeling upscales of the Mars Snooper and Starship Vega? Based on the interest when I show up to fly them there must be some interest in a large market release (and the spring loaded legs are cool). I'm not sure what became of Q-Modeling and Google didn't provide much help (I have a vague recollection that he got flooded out but...)
Also I'd second the request for something like the K-21 Gemini Titan.