Hello, Zen,

Only one I could find was in the Atan range, here: www.surfstore.co.uk/atan-mistral-boot-p-818.html

Have found Surfstore excellent to deal with, having small items delivered in about 8 days from order.

I think your biggest problem is your size: you appear to be right on the limits of "off the shelf"

You might also have a hunt around the "Boards" site boards.mpora.com/forums/equipment-f5.html, searching under "Atan" for comments on how good they are, or otherwise.