Scour ebay for Fluevog Race Face Vogs aka Racevogs and hope they aren't supremely ugly? I've never seen a pair in person (or a photo, even.)

Or you could go renegade, buy an oxford or half-boot with a huge sole, some metal safety insoles, and some cork/gel footbeds to go over them. Get out the dremel and mate the cleats to the oxfords at the right depth, or find a shoemaker (shoe repair) who'll do it for you.

There's an account floating around the net about doing this, I might have the link somewhere.