Check into these guys:

http://www.redwingshoes.com/

...at least you can email them and ask about size availablity. The logger boots look pretty good but I'd expect to pay $$$$.

Another possibility is to look on the net or in your local yellow pages for "cop supplies". Several of the military surplus joints near me seem to dabble in cop supplies as do the uniform companies...you might get lucky there.

Best

AA