Not to split hairs, but the Colour Classic is easily upgraded with a 575 board (which may have been the original intent with the CC design, until Sculley got it in his head that bigger was better). So in my mind it was effectively introduced if not literally. In much the same way as putting an LC 475 board into an LC III gives you an "LC IV" which Apple probably considered at one point. Again, the idea that one can simply slide in another Apple logic board and have it work perfectly without any mods, suggests that Apple was only one marketing campaign away from introducing it as an official model".
Not sure if you are limiting yourself to the original compact form factor or not, since the CC is definitely not the same footprint thanks to the color CRT. In which case, yes it is sad there is no B&W '040 "Classic III" compact. However, the SE/30 had an easy upgrade path via an '040 PDS slot upgrade. So in that sense, while not an official Apple product, again an extremely simple way to convert a B&W compact into an '040 (at least at the time). Now if it's a literal "Classic" design you want, then we're back to "yup it is a real shame".