Chuck I'm a fan of yours, and generally a fan of RailKing steam. But personally, I'm not a fan of streamlined steam. And I'm starting to doubt if we'll ever see newly-tooled die-cast locos from MTH, especially in the RailKing line. I'm pretty sure MTH has already offered this loco as a scale model in their Premier line. If you need a semi-scale version, I think your best hope would be to build it yourself!
There are some folks on the Forum who have shared their nice custom work on die-cast locos using bondo, JB Weld, etc. If you find a junker Crusader, maybe you could graft that front end onto an N&W shell? Just thinking aloud.