In reply to mcdweeb:
It might be handy getting your feet properly measured, for width as well as length. I was having all kinds of bother trying to get the right new boots, ended up going to see Si at mountainfeet near Manchester - a trip well worth it. I'm size 42/8, d+/e- in width.
Boots that haven't worked for me:
Sportiva Nepals (borrowed a pair from a mate for a day)
Sportiva Nepal evos (bought a pair, these are now for sale if anyone is looking)
Scarpa mantas - the older bluey leather ones on the DL last
Boots that I have now and do work for me:
B1: Scarpa Marmolada (red ones spring '17 - BQ last)
B2: scarpa Charmoz (blue / silver ones, not OD, FT last)
B3: scarpa mont blanc (AG last, not the newer mont blanc pro)
For scarpa boots there seems to be quite some variation in the lasts, but if you delve into the depths of their website there is some blurb on the current lasts, which helps give some clues - eg the rebel lasts / fit talks about focused toe power, which suggests toes are squashed together so maybe a narrower last.
The scarpa FT last does have quite a bulge in width across the forefoot, so the new Manta pros using that last might fit.
Good luck!