I've attempted to talk to a couple of people who make stuff for sale at the festivals around here, but when I say they can't put a dribble lip on it they're not interested. They seem to think that "nonfunctional" is a critical part of their "art."
I'd probably have better luck going down to one of the local hobby shops and making my own - which of course is on my list of "things to do - - someday."
I have no objection if someone wants to use the dimensions and description above to try to make a decent cup. The world is in great need. If anyone happens to be particularly interested, I could take a couple of snapshots to email. PM an email addy. The sales pitch is up above.
Most of those that I know to be "in the business" are located where shipping would likely cost as much as a cup, so I've resisted long distance personal orders; and the detail requirements leave a lot of room for "close but no cigar" results.
Lin in Kansas suggested that I should relate that she's bought "more than a dozen" cups/mugs that she thought "looked like mine," and I've tried them all (actually closer to two dozen). Haven't found one that fills the need. Both of my kids have asked that I make a will and leave them "the cup," so it's not just my own solitary opinion. And I've offered both of them the "rejects" that Lin (and others) have brought home, and they've declined them all, for the same various reasons I don't use any of them.