The question of bespoke speakers is an interesting once, actually.
Numerous good small companies do, or would probably, "build to suit" : GR, Salk, Selah, Vapor, Fritz. I've listed to all of these, and owned a pair of GR's, and all are excellent (different presentations for different tastes, noted).
But all of them build to way lower pricepoint. Even Rick Craig's dramatic line arrays at Selah probably don't tickle a quarter of the pricepoint in the OP.
Interesting question what these guys would do with a blank check, or whether one could approach a luxury maker with a custom request.
"Err do you think you could make those Wilson's sound a bit less etched?" 😉