The combo of NOT ADA, and must be 2-piece, and concealed trapway is a problem if you don't want it to look modern. If you'd take a 1-piece or ADA, you'd have more options.
Let me also say that most of the time toilets are installed such that you don't really see the portion with the trapway outline, but given your rather-aggressively stated concerns about seeing the trapway, I guess that's not good enough.
If you can find a previous-model Vespin CST764S or Carrolton CST774S, and it will be hard but not impossible since they have been discontinued, that may do the trick for you. I wouldn't worry about buying a discontinued Toto GMax toilet, however, as replacement parts will be easy to come by for a decade or more. You can get replacement parts for these toilets at Lowe's, made by the company that makes them for Toto (named Korky, in Wisconsin), at reasonable prices, and you can also get replacement parts directly from Toto. So that's not a concern. The trend is to "universal height", particularly in the skirted models.
I notice that Terry still shows them available in his online store, but I don't know if that means he still has some in stock; he doesn't ship, however. Nevertheless, a local plumbing supply may still have one or the other of them. You'd be hard-pressed to find them online, however.