I would try Crane's (phone or email them) Check the last few pages for one of his posts/ contact details.
I know Wolverine have cracked down on large discounting, but Im sure there's still some room to wiggle.
Crane, Id love your opinion. My current size 10's are perfect with thick socks and no insoles. Im looking to add insoles in future pairs. Would I be able to get away with a full size up or would that be too much you think, and best go with a half size?
Appreciate any help on this...
About a half size up should be fine. Try insoles with your current boots and see how they feel.