Oof! How mad/expensive an idea would it be to try and source some nice shiny Ambrosio alu-splinter rims (preferably clincher) and put them on some 10-spd hubs? First time I can remember seeing these so not sure if they're rocking horse shit?
I know the very similar-looking Mavics have a version that's clincher and will fit shimano 10-speed, if you're not committed specifically to the Ambrosio name or aren't opposed to some deceptive restickering.