In reply to jon:
Thanks Jon. Really helpful information. I'm a full size different and causes a real headache.
For anyone else looking for split sized pairs, I've had a split sized pair from Boreal as well, but they do charge 50% extra and are made to order so take a couple of weeks. Bought mine through Cold Mountain Kit. I've been in touch with Scarpa who totally refused to consider a split size and wouldn't tell me why. I'm guessing the smaller companies have more flexible production processes which makes it easier for them to do.
Will be going to find some Boldrini shoes to try on this weekend!