I’m in the same situation, - don’t like the ultraleggera design even though I know they’ll fit without spacers, which I also don’t want.
It’s also very difficult to cross reference the wheels listed on miata.net with what’s available here, I’ve been in touch with a few wheel suppliers and they’re really not interested in awkward fitments.
I’d really like a 7.5 or 8 inch width as well, and a slightly hollow concave front face, (the ultraleggera is convex)
I really don’t have much time to persue this either, which doesn’t help!
Good luck with your search, and please post if you find something.