You said you’re not worried about the price.
There are lots of places to get custom made boots. Don’t know where you are but a search for your location might find you a local boot maker. There are also many custom boot makers who do online fitting. Many are cowboy boots but there others. Expect $500 and up for custom boots that will last the rest of your life (with repairs, re-soles, etc.).
Just a couple examples; I have not bought from these places but have had my eye on Gokey boots for a long time: