Maybe Chris Craft would make you a pair .
Kidding aside, you would probably have to go custom and, while I've never done that for shoes (thankfully, I am a perfect 11.5 D, which is quite common and the only OTR item for me that fits well without tailoring or tweaking), I can only image how silly expensive that would be. Allen Edmonds might do something in your size and they, periodically, carry spectators.
Or you could go with a white buck and, I'd bet, you could find someone who carries one in your size.
If I buy too many shoes, cows will soon be on the endangered species list.