Pete... I know the Bare Trek boot only goes to a size 13, as the same as the drysuit boot.
http://barescubadiving.com/canada/si...ts/default.asp
Give them a call or email and maybe they can make a size for you?
I have read in another forum (don't shoot me) that a lot of guys with a foot your size size get the socks and use a sneaker or light weight hiking boot.