In reply to Welsh Kate:
Hi Kate,
I have a pair of the Altberg Mallerstang boots for mountaineering as no-one seems to make B rated boots to measure. In fact I have 2 pairs as Altberg don't do odd sized pairs, so it's far from a cheap option (I think they gave me a 20% discount or similar, but still almost £400 for a pair of B1/2 boots is a bit steep...), however they had to stretch their widest size further for my right foot and it's still pretty cramped.
Although i would love to get a pair of summer boots made to measure from them, the waiting list is 3 years and the cost well over £1000, so not really an option I'm able to take at the moment. In contrast I can get some less technical boots made to measure in a month to my spec (with limitations) for less than £200.